a type of organism that is usually unicellular and that lacks a nucleus and other specialized, membrane-bound organelles. their cytoplasm has ribosomes and dna in a strand or loop.
Answers
Prokaryotes are unicellular organisms that lack a nucleus and other membrane-bound organelles. Their genetic material, usually in the form of a circular strand or loop of DNA.
They are usually smaller and simpler in structure compared to eukaryotic organisms. The genetic material in prokaryotes is usually in the form of a single, circular DNA molecule that is located in the cytoplasm along with ribosomes.
Prokaryotes are found in a wide range of environments, including soil, water, and inside other organisms. They have a diverse range of metabolic capabilities, and some can perform photosynthesis, nitrogen fixation, and other important biochemical processes.
Bacteria, one of the main groups of prokaryotes, are found everywhere on Earth and play important roles in nutrient cycling, decomposition, and symbiotic relationships with other organisms. Some bacteria are pathogenic and can cause diseases, while others are beneficial and used in applications such as food fermentation and biotechnology.
Archaea, another group of prokaryotes, are found in extreme environments such as hot springs, salt flats, and deep-sea hydrothermal vents. They have unique metabolic pathways and cell membrane structures that allow them to survive in these extreme conditions.
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Related Questions
whats the answer????
Answers
Answer:
D, since there is already a lot of it in the cell
Why are there different sizes of bacterial colonies?
Answers
Answer:
colony size reduce means somehow its growth rate was hampered. In your experiment you r use salt but salt has a negative effect on E.coli.It dis regulate the osmotic balance of this bacterial cell after tolerance concentration may be this is the main reason of smaller colony size.
Stars change over millions of years.
O True
O False
Answers
Answer:
true
Explanation:
stars can change bc Stars change over time. ... It is in the clouds of dust and gas that stars are born. As more and more of the gas (which is mostly hydrogen) is pulled together by gravity into a cloud, the cloud starts to spin. The gas atoms start to bump into each other faster and faster.
what is the genetic makeup of an individual who has inherited jacobs syndrome?
Answers
The genetic makeup of an individual with Jacobs syndrome is characterized by having an extra Y chromosome, resulting in a 47,XYY karyotype.
Jacobs syndrome, also known as XYY syndrome, occurs in males and is caused by the presence of an extra Y chromosome in each of their cells. The typical genetic makeup for a male is 46,XY, but in the case of Jacobs syndrome, it becomes 47,XYY.
This chromosomal abnormality usually occurs as a random event during the formation of sperm cells. An error in cell division called nondisjunction can result in a sperm cell with an extra Y chromosome. If this sperm cell fertilizes an egg, the resulting child will have Jacobs syndrome. The syndrome is not inherited from the parents, as it is a spontaneous genetic event.
Individuals with Jacobs syndrome often have normal development and may not even be aware of their condition. Some affected males may experience learning disabilities, speech and language delays, or behavioral issues, but these symptoms can vary widely. In most cases, Jacobs syndrome does not have a significant impact on the individual's overall health or life expectancy.
In conclusion, the genetic makeup of an individual who has inherited Jacobs syndrome consists of an extra Y chromosome, resulting in a 47,XYY karyotype. This chromosomal abnormality typically occurs spontaneously during sperm cell formation and is not directly inherited from the parents.
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how animals and plant transport system is different from each other?
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Answer:
Hello! My name is kaori and today ill be helping you to finding the correct answer you need Let's begin.
\(answer\)
♡ Animals
• Speciliased tubes-arteries
• Speciliased tubes-arteriescapillaries in the veins
• all tubes are composed of living cells
• the concentration of substances transported is controlled
• the heart controlls the circulatory system. the heart is controlled by the nervous system.
• the rate of flow is moderate and is regulated by vasoconstriction and vasodilation
• the subtances being transported are respiratory gases, amino acids, glucose, vitamins, fatty acids etc
☆ Plants
• Spealised tubes -xylem vessels and trachids and phloem seive tubes
• Spealised tubes -xylem vessels and trachids and phloem seive tubes• some tubes are composed of living cells
example: phloem otherbare composed of dead cells
• the concentration of the substances being transported is NOT controlled.
• there is NO such control in plants
• the rate of flow in xylem and phloem is quite slow
• substances being transported are: amino acids, sucrose, fatty acids, etc.
HOPE THIS HELPED YOU.
What are chemical messengers that diffuse through tissue fluid and affect only nearby cells called?
Answers
Chemical messengers that diffuse through tissue fluid and affect only nearby cells are called paracrine.
In the field of science, paracrine can be described as cell signaling molecules that are produced in a cell and affect the nearby cells without having the requirement to be transported through the blood.
As paracrine travel through tissue fluids hence it can induce changes in nearby cells only, unlike the hormones, which travel long distances through the blood. Hence, paracrine is involved in the creation of local action. There are certain receptors and pathway system that is followed by the paracrine in order to cause a reaction in the nearby cells.
Examples of paracrine chemical messengers include growth factors or clotting factors.
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Which of these describes a way in which humans could increase biodiversity in a marine ecosystem? A. They could introduce new species to the ecosystem. B. They could limit fishing to only one kind of fish in the ecosystem. C. They could ban boating,snorkeling,and scuba diving in the ecosystem. D. They could restrict the amount of each type of fish or shellfish harvested from the ecosystem
Answers
Two narrow slits separated by 0.39 mm are illuminated by monochromatic light of wavelength 514 nm. How many bright fringes can be seen on a screen 1.2 cm wide placed 1.3 m in front of the slits?
Answers
The number of bright fringes (also known as interference maxima) produced by a double-slit setup, you can use the formula: n= L⋅λ/ d
n is the number of bright fringes.
L is the distance from the double slits to the screen.
λ is the wavelength of the light.
d is the separation between the slits.
L=1.3m
λ=514 nm =514×10⁻⁹ m
d=0.39 mm=0.39×10⁻³
n = 1.3 × 514×10⁻⁹ m/ 0.39×10⁻³
n≈1708.7
Therefore, the number of fringes must be a whole number (you can't have fractional fringes), you would round down to the nearest integer. Therefore, you would see 1708 bright fringes on the screen.
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Which features are found only in eukaryotes, only in prokaryotes, or in both eukaryotes and prokaryotes?
Answers
The answers include the following:
The features are found only in eukaryotes is membrane bound nucleus.The features are found only in prokaryotes is nucleoid.The features are found in both eukaryotes and prokaryotes are DNA, Mitochondria. Plasma membrane and ribosomes.What is a Prokaryote?These are the organisms which lacks a defined nucleus and membrane bound organelles while on the other hand, eukaryotes has both features and an example of a prokaryote is bacteria. It possesses distinct organelles such as nucleoid.
It has some similarities with eukaryotes in the organelles present such as ribosomes, plasma membrane, mitochondria etc which performs certain functions in the cell.
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what might happen if the life cycle of the milkweed plant changed in some way?
Answers
Answer:
It might Create an imbalance on the organisms feeding on it leading to imbalance in the ecosystem
While in fasting state, ___ tells the liver to release glucose for other organs to use
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While in fasting state, the hormone glucagon tells the liver to release glucose for other organs to use.
Glucagon is produced by the alpha cells of the pancreas and acts in opposition to insulin, which promotes the uptake and storage of glucose by cells. When blood glucose levels drop during fasting, glucagon is released to stimulate the liver to break down stored glycogen into glucose and release it into the bloodstream. This helps to maintain adequate blood glucose levels for other organs, such as the brain, to use as an energy source.Glucagon is a hormone that is produced by alpha cells in the pancreas. Its primary function is to raise the level of glucose in the blood. It does this by stimulating the liver to break down
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How much is DNA important to identify a group? Give a brief explanation on race ,whiteness and property? Does biological anthropologists and genome scientist need to add the relation between Europeans and Indigenous people while doing their research?
Answers
DNA is important in identifying genetic relationships within a group, but it alone is not sufficient to determine complex social constructs like race, whiteness, or property; the inclusion of social, cultural, and historical factors is crucial in understanding these concepts.
Biological anthropologists and genome scientists should consider the relationship between Europeans and Indigenous people in their research to provide a more comprehensive understanding of human genetic diversity and population history.
DNA analysis can provide valuable insights into genetic relationships within a group, such as determining genetic ancestry or identifying related individuals. However, race, whiteness, and property are social constructs that go beyond genetic factors and are shaped by historical, cultural, and socioeconomic factors. These concepts are complex and cannot be solely explained by genetic data. Therefore, it is important for researchers, including biological anthropologists and genome scientists, to recognize the limitations of genetic data and consider the broader social context when studying race, whiteness, and property.
In the context of researching Europeans and Indigenous people, it is crucial for researchers to acknowledge and incorporate the historical and ongoing relationships between these groups. This includes understanding colonization, displacement, and the impact of power dynamics on genetic diversity and health outcomes. By including this relationship in their research, scientists can contribute to a more accurate and nuanced understanding of human genetics and promote social and scientific equity.
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Which four of the following entities are generally included in the field of microbiology?
a) viroids bacteria
b) insects slime
c) molds mosses
d) archaea
Answers
The entities that are generally included in the field of microbiology viroids bacteria; option A
What is microbiology?
Microbiology is the biological study of microorganisms.
Microbiology includes many fields which study microorganisms such as:
FungibacteriaVirusesprotozoansTherefore, the field that will be included in microbiology is viroids bacteria.
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A student removes the shell of an egg exposing the semi-permeable membrane underneath. Because of the
egg's yolk, it has a solute concentration of about 2.0 g/dL. If the student places the egg into pure water for 24
hours, in which direction will water flow?
A. Into the cell
B. Out of the cell
C. Into and out of the cell at an equal rate
D. Water will not move at all
Answers
Answer: B. out of the shell
Explanation:
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If RNA strand reads AUG CGU AAU UAU, what did its source DNA read?
Answers
Answer:
TAC GCA TTA ATA
and apparently my answer needs to be 20 charcters long
sociality among primates is likely the result of which of the following selective pressures? a. predation b. niche competition c. adaptive radiation d. habitat
Answers
The answer is A. predation
in an experiment, the efficiency of oxygen exchange across the plasma membrane is being assessed in four artificial red blood cells. the table above lists some properties of those artificial cells. other conditions being equal, which artificial cell is predicted to be the most efficient in exchanging oxygen with the environment by diffusion?
Answers
The artificial cell resembles to hemoglobin is the most efficient in exchange of oxygen.
That artificial cell is considered as the most efficient in exchanging oxygen with the environment by diffusion which is more resembles in structure to the hemoglobin cell because hemoglobin cell is responsible for the exchange of carbondioxide and oxygen in the body of living organism. If the artificial cell has all the components which is present in hemoglobin cell then the artificial cell is considered more efficient in its function so we can conclude that artificial cell resembles to hemoglobin is the most efficient.
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Pili are made of the protein _____. Pilin
keratin
actin
myosin
Answers
Pili are made of the protein pilin, which is the first option, as pili are short, hair-like appendages that extend from the surface of some bacteria. These structures are primarily composed of the protein pilin, which forms a helical filament that gives the pili their characteristic shape.
The function of pili varies depending on the type of pili and the bacterial species that produce them. Some pili are involved in bacterial adhesion, allowing bacteria to attach to surfaces such as host cells or environmental substrates. Other pili are involved in bacterial motility, allowing bacteria to move around in their environment. Pili can also play a role in bacterial conjugation, which is the transfer of genetic material from one bacterial cell to another. The structure and composition of pili can vary depending on the bacterial species and the function of the pili.
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What is the combining form for cardiology?
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The combining form for cardiology is "cardi/o". It is derived from the Greek word "kardia," which means heart. This combining form is used in medical terminology to refer to the study, diagnosis, and treatment of diseases and conditions related to the heart.
For example, "cardiologist" is a medical specialist who specializes in the diagnosis and treatment of heart diseases and conditions, and "cardiogram" refers to a recording of the electrical activity of the heart.
Cardiomyopathy: A disease of the heart muscle that can lead to heart failure and other complications.
Cardiovascular: Referring to the heart and blood vessels.
Electrocardiogram (ECG or EKG): A test that records the electrical activity of the heart to assess its function.
Pericarditis: Inflammation of the sac that surrounds the heart (the pericardium).
Tachycardia: A fast heart rate, typically defined as a resting heart rate over 100 beats per minute.
The combining form "cardi/o" is used in many other medical terms related to the heart, including diagnostic tests, procedures, and treatments. Its use helps to provide a standardized and efficient way of communicating about the heart and its related conditions within the medical field.
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Question 17 of 25
Which strand of mRNA would be made during transcription using the DNA
strand shown below?
GCA TAG
A. GCU AUG
B. TAG GCA
C. CGU AUC
D. GCT ATC
Answers
Answer: The answer is C
Explanation: C and G pair with each other and T pairs with A and A pairs with U
A Holliday junction can best be defined as a region of. Question 3 options: A. DNA pyrimidine duplexes. B. DNA damage. C. duplex DNA. D. quadruplex DNA.
Answers
A Holliday junction can best be defined as a region of duplex DNA. The correct option is C.
A Holliday junction is a structure that forms when two double-stranded DNA molecules come together and exchange strands. It is a four-way junction in which two duplex DNA strands are crossed over one another, and each of the four strands is held together by base pairing. Holliday junctions play a crucial role in several biological processes such as DNA repair, meiosis, and DNA recombination.
In DNA repair, the Holliday junctions are resolved by nucleases to repair damaged DNA. During meiosis, Holliday junctions facilitate the exchange of genetic material between homologous chromosomes. Holliday junctions also play a significant role in DNA recombination, which is the process by which genetic material is exchanged between two DNA molecules.
In summary, a Holliday junction is a region of duplex DNA where two double-stranded DNA molecules are crossed over one another, and it plays a crucial role in DNA repair, meiosis, and DNA recombination. The correct option is C.
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these are true and false questions
1.during translation information on an RNA strand is used to assemble a protein
2.RNA exits the nucleus through osmosis
3.messenger RNA picks up amino acids in the cytoplasm and brings them to a ribosome for assembley into a protein
4. ribosomes use the information in RNA to assemble proteins
Answers
Answer:
1. True
2. False
3. False
4. True
Explanation:
1. DNA is transcribed into RNA which is then translated into protein. RNA contains the information required to produce proteins.
2. No, RNA exits the nucleus through a nuclear pore complex with the help of export receptors.
3. Amino acids are bound to tRNA not mRNA.
4. The RNA contains the information required to create proteins. Ribosomes mediate and catalyze the reaction to produce an amino acid chain using the information in mRNA.
pls guys i’m begging u to help me with this immediately!!! pls just help no one has been answering my questions at all just pls HELPPPPP
Answers
Answer:
Gills and Lungs
Explanation:
Aquatic animals use gills to filter through water, since they need water in their system to survive just as we need air in our system to survive, these two function the same. They both allow the intake and outtake of essential elements
when there is a disparity between the results of the fibrinogen antigen and the activity, the most likely diagnosis is:
Answers
The most likely diagnosis when there is a disparity between the results of the fibrinogen antigen and the activity is a congenital fibrinogen disorder.
Fibrinogen is a blood clotting factor that is made in the liver and is produced in response to injury and clotting. When the level of the antigen is normal but the activity is decreased, it indicates a congenital fibrinogen disorder.
This disorder is inherited and can be caused by mutations in the genes responsible for the production of fibrinogen. This can lead to a decrease in the amount of clotting factors in the blood and cause excessive bleeding. Treatment may involve replacement therapy with fibrinogen concentrate, antifibrinolytic drugs, and/or surgery.
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a researcher is comparing the size of sarcomeres in mice to those in elephants. what will he find? it is impossible to determine sarcomere size in elephants and mice, given that sarcomeres are dynamic and are constantly changing in length and diameter. sarcomere size is proportional to the size of the animal; sarcomeres of elephants will be much larger than sarcomeres in mice. sarcomere size is relatively constant in vertebrates. as a result, mouse and elephant sarcomeres will likely be equal in size. sarcomere size is inversely proportional to animal size; sarcomeres in mice will be much larger than sarcomeres in elephants.
Answers
The sarcomere is the muscle unit of contraction. Option C) sarcomere size is relatively constant in vertebrates. as a result, mouse and elephant sarcomeres will likely be equal in size.
What is a sarcomere?When talking about a sarcomere we are referring to the contractile unit of the contractile apparatus -muscle-.
In the sarcomere, we can identify the following components,
A-band. I-band. H-zone. Z-bandWhen the muscle contracts, the muscular fiber gets shorter and thicker due to the reduction in the sarcomere length.
The H line and the I band get shorter. The Z lines get closer to the A band, meaning they get closer to one another. The A band keeps constant in length.
The sarcomere length is about 2 mm during a contraction when actin filaments are completely superposed over the myosin filaments. This length is about the same in all vertebrates.
The correct option is C) sarcomere size is relatively constant in vertebrates. As a result, mouse and elephant sarcomeres will likely be equal in size.
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presence of a protein capsule and well defined nucleus.
A) Viruses or B) Bacteria.
Answers
Viruses have the presence of a protein capsule and a well-defined nucleus, hence option A is correct.
What is the structure of a virus?Virus, capsid which is resistant to antibiotics, and several external factors. It is made up of protein, inside the genetic material of the, it may be DNA or RNA information coded about to express protein capsule.
Bacteria is the prokaryotic class of the organism, it is a unicellular organism not having any protein capsule, prokaryotes means not having true nucleus.
Therefore, the presence of a protein capsule and a well-defined nucleus is the character of the virus.
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Question 1 (Multiple Choice Worth 2 points)
(04.06 MC)
A population of mice thrive when grain and seed resources are plentiful. When food runs out, they compete with
one another for food and no longer produce offspring. This is an example of
O biotic potential
O group behavior
O individual behavior
O interspecific competition
Answers
individual behavior
Explanation:
if the mice are competing with each other that means that it's every man for himself.
The given example suggests the individual behavior of the mice because they change their behavior according to conditions.
How a population of mice affects the resources?In nature, organisms search for resources first, and if this availability is fulfilled, they reproduce themselves and increase the number of offsprings, but when the availability of resources are depleted they compete with each other.
The individual behavior of the mice in the population is defined as some mice fighting for the same resources and others mating with each other.
In the given question interspecific competition is not a right choice because it is the competition between the organism of two different species for the same resources.
Therefore, option C is correct.
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The tomato you examine in the lab develops from what structure in an angiosperm?.
Answers
Answer: The flower
Explanation: Angiosperms, or flowering plants, exist in many forms such as orchids, apple trees, and even tomatoes. The flowers act as pollination stations, which attract bees and bugs, and other pollinators to fertilize the flower. Once fertilized, it begins to develop into a fruit. This is why you will see cherry blossoms, apple tree blossoms, and a multitude of other flowering plants and trees producing fruit. It's an excellent seed carrier and encourages animals to spread the seed to far and wide places through their poop!
Which of the following would increase species biodiversity in Florida?
A.
Placing no limits on alligator hunting in lakes
B.
Legalized hunting for monkeys around the St. John’s River
C.
Protecting black bears in state or national forests
D.
Clearing land for a new entertainment theme park
Answers
Answer:
C
Explanation:
Biodiversity measures the variety of organisms in an ecosystem. Allowing hunters to hunt alligators depletes the alligator population which decreases biodiversity. Legalizing monkey hunting depletes the population which decreases bio diversity. Deforestization rids animals of their habitats which massively decreases biodiversity due to the plants, trees, and animals destroyed in the process. That and the fact that there will be less sites for nesting and homes for the animals which will decrease biodiversity even more over time. It's all connected.
Protecting a species conserves the population and ensures the safety of the animal especially from human interference. This allows the animal (specifically the black bear) to survive in its habitat unharmed and allows it to play its role in the ecosystem and contribute to biodiversity.
Which statement about cellular respiration is true ?
A. Oxygen is waste in cellular respiration for BOTH plants and animals
B. Oxygen is a waste in cellular respiration in plants but NOT in animals
C. Carbon dioxide is a waste in cellular respiration in BOTH plants and animals
D. Carbon dioxide is a waste in cellular respiration in plants but NOT in animals
Answers
Answer:
C. Carbon dioxide is a waste in cellular respiration in BOTH plants and animals
Explanation:
Cellular respiration occurs in animals and plants. It breaks down sugar in the presence of oxygen to release energy in the form of ATP. This process releases carbon dioxide and water as waste products.
Answer:
the answer is c
Explanation: