What are organelles?
A. Groups of organs.
B. The different types of cells.
C. The tiny structures inside cells; kind of like our organs, but at a cellular level.
Answers
Answer:
C) Organelles are the tiny structures inside cells; kind of like our organs, but at a cellular level
Explanation:
The organelles inside of cells perform actions that are vital for survival, much like our organs perform actions that help us survive.
Hope this helps!
Related Questions
what is the exchange of oxygen and carbon dioxide called
Answers
The exchange of oxygen and carbon dioxide between an organism and its environment is called respiration.
In the context of human biology, respiration refers to the process by which oxygen is taken in from the atmosphere and delivered to cells while carbon dioxide, a waste product of cellular metabolism, is removed from the cells and expelled from the body. It involves two distinct but interconnected processes: external respiration and internal respiration.
1. External Respiration: External respiration occurs in the respiratory system, specifically in the lungs. It involves the exchange of gases between the alveoli (tiny air sacs in the lungs) and the surrounding capillaries. Oxygen from the inhaled air diffuses across the thin walls of the alveoli into the capillaries, where it binds to hemoglobin in red blood cells for transport to body tissues. At the same time, carbon dioxide, produced as a waste product in cells, diffuses from the capillaries into the alveoli to be exhaled.
2. Internal Respiration: Internal respiration refers to the exchange of gases that occurs at the cellular level. Once oxygen-rich blood reaches the body tissues through the systemic circulation, oxygen diffuses from the capillaries into the cells, where it is utilized in cellular respiration. This process generates energy for various cellular activities. Simultaneously, carbon dioxide, a byproduct of cellular respiration, diffuses out of the cells into the capillaries, where it is carried back to the lungs for elimination.
It's important to note that respiration is not limited to humans but occurs in various organisms, ranging from single-celled organisms to complex multicellular organisms. However, the mechanisms and structures involved may differ depending on the organism's respiratory system.
Overall, the exchange of oxygen and carbon dioxide, which occurs through external and internal respiration, is vital for sustaining cellular functions and maintaining homeostasis in living organisms.
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in most cases, the two major climatic factors affecting the distribution of organisms in terrestrial ecosystems are
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Answer:
temperature and water
temperature in water are important abiotic factor that affects species distribution
Which is required for both anaerobic respiration and aerobic respiration?
O oxygen
water
O mitochondria
O glucose
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the ability of the rib cage to ______ allows an increase in lung capacity for respiration.
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8. All seeds hove seed or fruit to protect them as they grow. How do seeds grow? 9. The of a plant begins with a seed. 10. The way plants grow, five, and is called their life cycle. 11. Most seeds need water, food, and a little heat to become new plants. 12. A new plant has the same life cycle as its plant. Critical Thinking 13. How ore new plants that grow from seeds like their parent plonts?
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Seeds grow with the help of various natural resources like water, oxygen, and sunlight, which help them to sprout and grow roots and develop into new plants. Some seeds grow as soon as they land in the ground, while others need a specific time period to grow.
The life of a plant begins with a seed that contains the necessary resources required for the plant's growth, which includes the embryo, endosperm, and protective seed coat.
The process through which plants grow, reproduce, and die is called their life cycle. It includes different stages like germination, growth, flowering, pollination, fertilization, seed production, and dispersal.
Seeds need water, food, and a little heat to grow into new plants. Water helps seeds to soften and expand, and food helps them to provide the necessary nutrients required for growth. The heat helps seeds to break dormancy and activate enzymes that speed up the germination process.
A new plant has the same life cycle as its parent plant. Plants have a unique life cycle, and every stage of the life cycle is essential for their growth and development. New plants inherit their genetic traits from their parent plants, and their life cycle is the same as that of their parent plant.
New plants that grow from seeds inherit their genetic traits from their parent plants and have the same life cycle as their parent plants. The life cycle of a plant includes the stages of germination, growth, flowering, pollination, fertilization, seed production, and dispersal. Thus, new plants that grow from seeds are like their parent plants.
I can’t decide on A or D I forgot this lol
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Answer: D
Explanation:
In one paragraph, explain why caucasians are more lactose persistent (tolerant) than the rest of the group of people in the world.
Answers
Answer:
Caucasians are more lactose persistent because they come from a long line of people who have been able to adapt to the lactose in milk. They have a mutation in their DNA that allows them to break down the lactose into glucose and galactose, which are then used for energy by the body.
if a plant is infected with a virus that blocks the enzyme atp synthase, the calvin cycle will still be able to produce g3p.
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The plant metabolism is a complex process that requires the coordination of multiple cellular pathways, including photosynthesis and respiration, for the optimal growth and survival of the organism.
A plant cell's primary energy currency is adenosine triphosphate (ATP), which is generated by the enzyme ATP synthase through the process of oxidative phosphorylation, which occurs in the mitochondria. This ATP provides the energy required for the plant to carry out its metabolic processes. However, if a plant is infected with a virus that blocks ATP synthase's enzyme, it cannot produce ATP, and hence, its metabolism and growth are affected.
Nonetheless, the Calvin Cycle is still capable of producing glyceraldehyde 3-phosphate (G3P), even if ATP synthesis is blocked by a virus. Calvin cycle is a biochemical pathway of photosynthesis in which carbon dioxide is converted into organic compounds, with the help of light energy, by the plant's chloroplasts. During the Calvin cycle, carbon dioxide combines with ribulose-1, 5-bisphosphate (RuBP) to form two molecules of 3-phosphoglycerate, which are converted to glyceraldehyde 3-phosphate (G3P) by utilizing energy and reducing power from ATP and NADPH, respectively, which are generated during the light-dependent reactions. These G3P molecules are used to synthesize glucose, starch, and other organic compounds, which provide energy to the plant. In conclusion, the plant's ability to produce G3P by the Calvin cycle, even if the ATP synthase enzyme is blocked, can help the plant to survive and grow under stress conditions like viral infection.
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When and where would the number of daylight hours each day be the greatest?
A during the winter near the equator
B during the summer near the equator
C during the winter near the North Pole
D during the summer near the north pole.
Answers
Answer:
D. during the summer near the North Pole
Explanation:
The angle of the sun above Earth's Northern Hemisphere is greatest on this day. Because Earth is tilted toward the sun to the maximum degree, the North Pole has 24 hours of daylight on June 20 or 21, whereas the South Pole (which is tilted away from the sun to the maximum degree) has 24 hours of darkness.
Answer:
The answer should be D
Explanation:
Alice was participating in a photosynthesis lab for science class. The lab procedures instructed Alice to prepare a test tube containing water, a sprig of elodea (a common aquarium plant), and 10 g of sodium bicarbonate (NaHCO3). She was then instructed to place the test tube in front of a strong light source for one minute. Alice noticed tiny bubbles forming on the leaves of the elodea. What is the most logical explanation for why Alice saw bubbles forming on the leaves of the elodea?Group of answer choicesThe bubbles formed as a result of the hydrogen from the sodium bicarbonate mixture dissolving the elodea leaves.The bubbles formed from the release of water molecules from the elodea leaves.The bubbles formed as the elodea plant released oxygen from the elodea leaves.The bubbles formed as the elodea plant released carbon dioxide from the elodea leaves.
Answers
Step 1.
Write down the experiment data.
- tube containing water;
- alodea (photosynthetic organism);
- 10 g of sodium bicarbonate;
- light source.
Step 2.
Why bubbles are formed on the leaves of the alodea?
The experiment have all the condictions for photosynthesis, since it provides: water (that is in the tube), CO2 (because of the dissolved sodium bicarbonate), light (because of the string light source). Therefore the most ogical explanation for Alice experiment results is: the bubbles formed as the elodea plant releases oxygen from the elodea leaves, that because with all the elements in the experiment the plant can do a normal photosynthetic process that way realing oxygen in the tube and forming bubbles of "air".
The parasitic fungi, microsporidia were thought to bebecause of __________
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The parasitic fungi, microsporidia were thought to be protozoa because of their small size and intracellular parasitism. However, further studies and research have revealed that they are actually a type of fungi.
Hi! The parasitic fungi, microsporidia, were thought to be primitive eukaryotes because of their reduced genome size and simple cellular structure.
The parasitic fungi, microsporidia, were once thought to be protozoan parasites because of their small size, lack of typical fungal features, and unique mechanisms of intracellular parasitism. However, molecular and genetic studies have since revealed that microsporidia are actually fungi and are now classified as a phylum within the kingdom Fungi. Microsporidia are obligate intracellular parasites that infect a wide range of hosts, including insects, fish, birds, and mammals, including humans. They have a highly reduced genome, lack mitochondria, and rely on their host cells for many essential functions, such as energy production.
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Help? I’ll give brainlist
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Answer:
A
Explanation:
briefly discuss five economic importance of microorganisms
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Answer:
Bacteria are economically important as these microorganisms are used by humans for many purposes. The beneficial uses of bacteria include the production of traditional foods such as fudge, yogurt, cheese, and vinegar. Microbes are also important in agriculture for compost and fertilizer production.
Answer:
The human body has 10 microorganisms for every human cell, and these microbes contribute to digestion, produce vitamin K, promote the development of the immune system, and detoxify harmful chemicals. They are also important in agriculture for compost and fertilizer production.
Explanation:
Passage 1: Two or more individuals trying to use the same resource, such as food, water, shelter, space, or sunlight, is called competition. Because resources are in limited supply in the environment, the use of them by one individual or population decreases the amount available to other organisms. Competition also occurs between individuals within a population. The elk in Yellowstone National Park are herbivores that compete with each other for the same food plants in the park. According to passage 1, competition occurs between which of the following?
Answers
Answer:
between individuals
Explanation:
Given in paragraph
What is the function of DNA? It takes the message of the amino acid order for proteins to the cytoplasm, where the protein will be built. It serves as an enzyme to speed up many kinds of biochemical reactions in the cell. It builds proteins from amino acids using the instructions stored in RNA. It stores in the nucleus the information a cell needs to make its proteins with the right orders of amino acids.
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Answer: The answer is B. (It stores in the nucleus the information a cell needs to make its proteins with the right orders of amino acids.)
Explanation: I took the test and this was the answer! :)
The function of DNA (deoxyribonucleic acid) is to store and transmit genetic information from one generation to the next, and it stores in the nucleus the information a cell needs to make its proteins with the right orders of amino acids. That is the last option.
What is DNA?DNA is a molecule composed of long chains of nucleotides. A nucleotide is made up of three components: a sugar molecule, a phosphate group, and a nitrogenous base. The process of gene expression begins with the transcription of DNA into RNA (ribonucleic acid). RNA is a molecule similar in structure to DNA but with a few key differences, such as the presence of the nitrogenous base uracil (U) instead of thymine. DNA also plays a role in the regulation of gene expression. Certain regions of DNA, called promoters and enhancers, help to control when and where a gene is expressed.
Hence, it stores in the nucleus the information a cell needs to make its proteins with the right orders of amino acids. That is the last option.
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Part 4 - Natural Selection and Adaptations
3 of 113 of 11 Items
Item 3
A scientist studied a snail population that had a variation of shell colors. The number of each differently colored snail shell was recorded. The graph shows the data the scientist collected.
Over time, the rocks on which the snails lived became covered with dark-colored seaweed.
Which graph best represents the range of colors in the snail population that resulted from natural selection after the dark-colored seaweed covered the rocks?
Answers
There are different types of natural selection. When one of the extremes phenotypes is being favored, directional selection is going on. Meanwhile, balancing selection increases the proportion of intermediate phenotype.
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Since I do not have the graphs, I will set different potential scenarios
Let us assume the snails shell has three phenotypes: light brown, brown, and dark brown.Light brown and dark brown are the extreme phenotypesLet us also assume that seaweed is brown-colored.Scenario 1: More light brown individuals than brown and dark brown
Probably after the dark-colored seaweed covered the rocks, snails needed to camouflage to avoid predation. So they must have suffered a change in color from light brown to dark brown.
Since this new trait is beneficial, natural selection favored it.
So animals change from being light brown to dark brown.
The type of natural selection acting here is directional selection.
A population that is under the effects of directional selection, experiences an increase in the proportion of individuals expressing an extreme phenotype, different from the original one.
In these cases, interactions between living organisms and the environment modify in the same direction.
So, the most abundant individuals turned from being light brown to being dark brown.
After dark-colored seaweed covered the rocks, the number of dark brown individuals increased, and the light brown individuals decreased.
**********************
Scenario 2: More brown individuals than light brown and dark brown
This is the same situation as before. In this case, there were more brown individuals than snails expressing extreme phenotypes.
**********************
Scenario 3:
Now let us assume three different phenotypes: Yellow, brown and greyYellow and Grey are the extreme phenotypesSeaweed is brown-colored.Let us suppose that the original number of individuals was higher for one of the extreme traits, either yellow or grey.
After the seaweed-covered rocks, snails needed to camouflage to avoid predation, so they changed their color from yellow or grey to brown.
In this scenario, the intermediate phenotype is being favored by natural selection over the extreme phenotypes.
Balancing selection -or Stabilizing selection-, decreases the number of individuals expressing the extreme phenotype and favors individuals that exhibit medium-range characteristics. These are the ones that get to survive. Selective pressure is against h0m0zyg0tes.
In this case, the number of individuals expressing yellow or grey shells decreases, while individuals with brown color increase.
In the attached files you will find graphs for the three scenarios.
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II
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101
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Using the alleles A and a, what is the genotype of individual
a) 11-6
b) 1-4
11-7
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Answer:
what is that supposed to be? maybe a pic of the question?
the membranous areas between the cranial bones of the fetal skull are
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The membranous areas between the cranial bones of the fetal skull are known as fontanelles.
These fontanelles are soft spots on a newborn's head where the cranial bones have not yet fully fused together. There are six fontanelles in total, with the two most prominent ones being the anterior fontanelle (located at the top of the head) and the posterior fontanelle (located towards the back of the head). Fontanelles are essential for the growth and development of a fetus, as they allow the skull to expand and accommodate the rapidly growing brain. They also provide some flexibility to the skull during childbirth, making it easier for the baby to pass through the birth canal without causing damage to the brain.
As a child grows, the fontanelles gradually close and the cranial bones fuse together. The posterior fontanelle typically closes within 2-3 months after birth, while the anterior fontanelle takes longer and usually closes by the age of 18-24 months. In summary, the membranous areas between the cranial bones of the fetal skull, known as fontanelles, play a crucial role in fetal brain development and provide necessary flexibility during childbirth. These fontanelles eventually close as the child matures, with the cranial bones ultimately fusing together.
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question 4 you're studying mn blood type (determined by one gene with two alleles) in navajo native americans, and you get the following genotype counts: mm: 400 mn: 1200 nn: 400 based on these numbers, are the navajo at hardy-weinberg for this blood group gene? (if individual genotype frequencies are all within 0.05 of expectations, consider that to be not different; if individual genotype frequencies differ by more than 0.05 from expectations, then consider that to be different) if they differ from hw, does the data suggest a wahlund effect?
Answers
Based on the number of MN blood group genotypes, they are not from the HW data, possibly due to the Wahlund effect of interbreeding with neighboring tribes (or maybe inbreeding)
In population genetics, the Wahlund effect is the buildup of heterozygosity (ie when an organism has two different alleles at a locus) in a population caused by the structure of subpopulations. That is, if two or more subpopulations are in Hardy-Weinberg equilibrium but have different allele frequencies, the overall heterozygosity is less than if the entire population is in equilibrium. The underlying cause of this population subdivision could be a bottleneck to the geographic flow of genes followed by genetic shifts within the subpopulation.
Genotype frequency:
MM (p2) = 400/2000 = 0.2MN(2pq) = 1200/2000 = 0.6NN (q2) = 400/2000 = 0.2Allele frequency:
Frequency M = p = p² + 1/2 (2pq) = 0.2 + 1/2 (0.6) = 0.2 + 0.3 = 0.5
Frequency N = q = 1-0.5 = 0.5.
Expected genotype frequencies (assuming Hardy-Weinberg):
MM (p²) = (0.5)² = 0.25
MN (2pq) = 2(0.5)(0.5) = 0.5
NN (q²) = (0.5)² = 0.25
Expected number of individuals from each genotype:
MM = 0.25 X 400 = 100
MN = 0.5 X 1200 = 600
NN = 0.25 X 400 = 100
CHI-SQUARE (X²):
X² = Σ(O-E)²/E
X² = (400-100)²/400 + (1200-600)²/1200 + (400-100)²/40
X² =225 + 180 + 200
X² =630
X² (Calculated) > X² (table), then reject the null hypothesis. Not on HWE.
Therefore, conclude there is a statistically significant difference between what was observed and what was expected under Hardy-Weinberg. That is, the null hypothesis is rejected and concludes that the population is not in HWE. They don't, possibly due to the Wahlund effect of interbreeding with neighboring tribes (or possibly inbreeding).
Complete question, see the picture
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why does the electron transport chain occur in the inner mitochondria in cellular respirationl membrane
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The electron transport chain (ETC) occurs in the inner mitochondrial membrane in cellular respiration because this is where the necessary components for the ETC are located.
The inner mitochondrial membrane is a highly specialized structure that is rich in protein complexes and enzymes that are responsible for the transfer of electrons and the production of ATP, which is the primary source of energy for the cell.The inner mitochondrial membrane is also organized into two distinct regions, the inner and outer membranes, that are separated by the intermembrane space.
The ETC takes place in the inner membrane, where the electron carriers, such as cytochromes, are embedded. These electron carriers transfer electrons along the ETC, and the energy released from this process is used to pump protons across the inner mitochondrial membrane, creating a proton gradient. This proton gradient is then used to generate ATP through the process of chemiosmosis.
Moreover, the inner mitochondrial membrane is also selectively permeable and this is important for maintaining the necessary conditions for the ETC to take place. The inner mitochondrial membrane is composed of a phospholipid bilayer that serves as a barrier to prevent the leakage of protons and other small molecules, which would disrupt the proton gradient and inhibit ATP production.
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Prior to any modifications in an eukaryote, a transcribed RNA can be called Choose the TWO correct answers.
O siRNA
O tRNA
O rRNA
O mRNA
O hnRNA
O pre-mRNA
O IncRNA
O sחRNA
Answers
Prior to any modifications in an eukaryote, a transcribed RNA can be called hnRNA and pre-mRNA.
What is eukaryote ?
A eukaryote is a type of organism that has a nucleus and other membrane-bound organelles.
Therefore, Prior to any modifications in an eukaryote, a transcribed RNA can be called hnRNA and pre-mRNA.
hnRNA stands for heterogeneous nuclear RNA. It is the initial transcript of a gene that has not yet been processed. hnRNA contains exons and introns, which are later spliced out to form mRNA.pre-mRNA stands for precursor messenger RNA. It is the processed form of hnRNA that has had the introns removed. Pre-mRNA is then exported from the nucleus to the cytoplasm, where it is translated into protein.Learn more about eukaryote here : brainly.com/question/30584795
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Why do we need RNA and not just DNA?
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The Central dogma of molecular biology suggests that the primary role of RNA is to convert the information stored in DNA into proteins. So, we need RNA and not just DNA.
In general the role of mRNA is to carry out protein information from the DNA in a cell's nucleus to the cell's cytoplasm , This is the place were the where the protein manufacturing machinery reads the mRNA sequence and three-base codon is translated into its corresponding amino acid in a growing protein chain.
Hence, mRNA molecules are used to carry the genetic information needed to make proteins. These are responsible for carrying information from the DNA in the nucleus of the cell to the cytoplasm the place where proteins gets manufactured.
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The full moon starts at the beginning of the lunar cycle. Will give brainliest!!
A.) true
B.) false
Answers
Answer:
False.
Explanation:
The new moon begins at the lunar cycle. But the full moon ends at the lunar cycle. Hope this helps! ^^
how do glycosis, pyruvate processing, the Krebs cycle, and the electron transport chain work together to provide energy for the cell?
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Answer:
Krebs Cycle (also known as the Citric Acid Cycle): Uses the pyruvate molecules from Glycolysis to generate 2 ATP as well as several molecules of FADH2 and NADH for the electron transport chain. Krebs Cycle takes place in the mitochondrial matrix and requires oxygen.
Explain how a mutation in a single cell can lead to the development of a
tumor and cancer ?
Answers
Answer:
the pace of the cell cycle speeds up as the effectiveness of the control and repair mechanisms decreases Uncontrolled growth of the mutated cells outpaces the growth of normal cells in the area
Explanation:
a indirect attachment uses connective tissue wrappings of the skeletal muscle to extend as a tendon to anchor the muscle to bone, cartilage or fascia. group of answer choices true false
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"A indirect attachment uses connective tissue wrappings of the skeletal muscle to extend as a tendon to anchor the muscle to bone, cartilage or fascia" given statement is true.
What is an indirect attachment in muscle?Indirect muscle attachments connect to tendons and ligaments rather than the bone itself. Despite having less mobility, they are less likely to injure people. The tendon, a robust and flexible tube that connects muscles to bone, is made of collagen fibers.
The connective tissue coverings of the skeletal muscle support and protect it. They assist in keeping it in place and in shape. The connective tissue that covers skeletal muscle helps to protect the muscles from injury.
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An experiment consists of drawing two balls out of an urn with replacement. The urn has 1 red ball, 1 white ball, and 1 blue ball. How many possible outcomes have one white ball?
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in what ways can mitochondria adapt to the changing needs of a cell?
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A) They can change their location;C) They can change their number;D) They can change their shape; these are the ways that mitochondria adapt to the changing needs of a cell.
Mitochondria are highly dynamic organelles that can adapt to the changing needs of a cell in a number of ways. For example, they can change their location by moving to areas of the cell that require more energy, such as near the nucleus or the cell membrane. They can also change their internal structure, such as by forming more or fewer cristae. Additionally, mitochondria can change their number by either fissioning and dividing into two new mitochondria or merging with other mitochondria. Likewise, mitochondria can also change their shape in response to the demands of the cell. Finally, mitochondria are able to carry out glycolysis, which is the breakdown of glucose to produce energy. This ability to carry out glycolysis enables the mitochondria to provide a cell with energy when energy demands are high.
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complete question:In what ways can mitochondria adapt to the changing needs of a cell?
Choose one or more:
A) They can change their location.
B) They can change their internal structure.
C) They can change their number.
D) They can change their shape.
E) They can carry out glycolysis.
Differentiate Monocots and Dicots
Answers
Answer: Monocot and Dicot
Explanation:
Monocots are seeds which have only one cotyledons. Plants having monocot seeds have parallel venation leaves (like lines running down the leaf). These seeds cannot be broken open. Dicot are seeds that have 2 cotyledons. Plants having dicot seeds have reticulate venation leaves (like veins). These seeds may be opened in two halves.
CELL TRANSPORT: Describe how a large protein and an oxygen molecule will
enter or leave a cell, HINT they do not use the same transport method.
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Answer:
Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ).
It is possible for large molecules to enter a cell by a process called endocytosis, where a small piece of the cell membrane wraps around the particle and is brought into the cell. If the particle is solid, endocytosis is also called phagocytosis. If fluid droplets are taken in, the processes is called pinocytosis.