06.02 Plant Cells and Tissues
Summary submission

Answer:

The functions of nucleic acids have to do with the storage and expression of genetic information.

Explanation:

True. The T cell with its T cell receptors antigens , can recognize antigens only when the antigens are complexed with self-proteins known as major histocompatibility complex found on host cell surfaces.

This statement is true . Antigens are any substance that is capable of stimulating an immune response and can activate lymphocytes, such as T cells and B cells.

An antigen is a molecule that is capable of binding specifically to an antibody or to a T-cell receptor.  T-cells are activated when they come into contact with a cell that has already been infected by a virus or a cancer cell.

These cells present small pieces of the invader on their surface, called antigen peptides, within a protein carrier called MHC (major histocompatibility complex).

The T cell is capable of recognizing these antigen peptides only when they are complexed with self-proteins known as major histocompatibility complex found on host cell surfaces.

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Answer:

D. hot, but much cooler than at a hydrothermal vent

Explanation:

A cold seep is an area in the ocean floor where hydrogen sulfide, methane and other hydrocarbon rich fluids seep through thus forming a brine pool.

A cold seep is also called a cold vent and its temperature is not necessary lower than that of the surrounding water, but it is lower than that of a hydrothermal vent which is about 60 °C.

Answer:

it is a plato users

Explanation:

Answer:

Menstruation is a time in a young-women's life where she starts to bleed from her ding-dong. This happens because when an egg in her uterus is not fertilized by a sperm, the lining of the uterus breaks itself down and passes out through the uterus opening, including the egg.

Answer:

OA. Elastic energy is transformed into electrical energy.

Explanation:

pls hart and mark brainiest

Answer:

Biological or internal factors such as age,gender, inherited genetic defects,skin types,etc

environmental exposure eg exposure to Radon and UV radiation and fine particulate matter

Answer:

Answer is A.

Explanation:

I hope it's helpful!

Answer: A

Explanation: 100% :)

Beadle and Tatum used nutritional mutants called "auxotrophs" to study the relationship between genes and proteins in neurospora.

Auxotrophs are mutants that have lost the ability to synthesize a particular nutrient and require it to be supplied in their growth medium. By creating these mutants and observing their growth in different nutritional conditions, Beadle and Tatum were able to identify specific genes and their corresponding enzymes involved in various metabolic pathways.

This led to their "one gene, one enzyme" hypothesis, which proposed that each gene is responsible for producing a single enzyme. This concept was later modified to "one gene, one polypeptide" as not all proteins are enzymes, but the fundamental idea remained the same. Their work with neurospora also laid the foundation for modern molecular genetics and the understanding of how mutations in genes can lead to changes in protein structure and function, ultimately impacting the traits and characteristics of an organism.

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The statement that is true regarding a phylogenetic tree is: "Phylogenetic trees could be considered physical representations of hypotheses that seek to establish the evolutionary relationships between different organisms."

A phylogenetic tree is a graphical representation of the evolutionary history and relationships among organisms, and it is based on molecular and genetic data, morphological characteristics, and other relevant information. The tree is constructed through a process called phylogenetic analysis, which involves comparing sequences of DNA, RNA, or proteins to determine the similarities and differences between different organisms. The resulting tree represents the hypothetical evolutionary relationships between the organisms being studied and provides insights into their origins and diversification over time.

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Chile is closer to the east pacific rise than the tonga. Therefore, the chile trench is closer and the tonga is further

The Eastern Tropical Pacific Ocean (ETPO) covers 199,665,900 ha of coastal and marine habitats along the Pacific Coast of Central America, from southern Mexico to northern Peru. Here, more than 170 South Pacific islands make up the Polynesian nation of Tonga, most of which are surrounded by white beaches and coral reefs and are covered in tropical rainforest.

Lagoons and limestone cliffs guard the main island of Tongatapu. In addition to beach resorts, plantations, and the Ha'amonga a Maui, a significant coral gate from the 1200s, it is home to the rural capital of Nuku'alofa. The East Pacific Rise is a mid-ocean rise, a divergent tectonic plate boundary located along the floor of the Pacific Ocean. It separates the Pacific Plate to the west from the North American Plate, the Rivera Plate, the Cocos Plate, the Nazca Plate, and the Antarctic Plate

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The certain proteins, known as chromatin modifiers, act as intermediaries between DNA sequences and specific histone protein sequences to modify chromatin structure and activate transcription.

Chromatin is the complex of DNA and histone proteins that make up chromosomes. Chromatin structure can be modified in various ways to regulate gene expression.

One mechanism involves the addition or removal of chemical groups, such as acetyl or methyl groups, to the histone proteins.

This modification can either open or close the chromatin structure, making it more or less accessible to transcription factors that bind to specific DNA sequences and activate gene expression.
Chromatin modifiers play a critical role in regulating gene expression by modifying the structure of chromatin. This process is essential for normal development and homeostasis, and dysregulation of chromatin modifiers has been implicated in various diseases, including cancer.

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Answer:A

Explanation:it makes sense

Answer:

Protein synthesis is the process in which cells make proteins. It occurs in two stages: transcription and translation. Transcription is the transfer of genetic instructions in DNA to mRNA in the nucleus. It includes the steps of initiation, elongation, and termination.

Explanation:

hope this helps

Answer:

Carbohydrates are molecules composed of carbon, hydrogen, and oxygen, and they include sugars and starches. Carbohydrates can be broken down to provide a source of usable chemical energy for cells.

Explanation:

The functions of spliceosomes in RNA splicing are to remove intervening introns between exons and join the resulting ends of the exons.

The functions of spliceosomes in RNA splicing are to remove intervening introns between exons and join the resulting ends of the exons, as well as to remove intervening exons between introns and join the resulting ends of the introns. In addition, spliceosomes also remove 5' caps between exons and join the resulting ends of the exons. They do not remove the poly(A) tails from pre-mRNAs. Overall, spliceosomes play a crucial role in generating mature mRNA molecules by precisely removing introns and joining exons together.
The primary function of spliceosomes in RNA splicing is to remove intervening introns between exons and join the resulting ends of the exons. This process leads to the formation of mature mRNAs, which can then be used for protein synthesis.

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Answer:

BIOSYNTHESIS OF AMINO ACIDS

Explanation:

SANA MAKATULOG:>

The strains and media used in a bacterial conjugation are described below. After you have reviewed the information, match up the strains with their growth properties. Strains: CS4020: Fla trp/Alacatrp : Leu", Strs (this strain is not able to make its own leucine and is sensitive to Streptomycin: contains a plasmid with genes for making tryptophan and utilizing lactose)CS402R: F.

Alacatrp, Stra: Trp, Str" (this strain is not able to make its own tryptophan or utilize lactose and is resistant to Streptomycin)Media: GM glucose minimal salts GMS - glucose minimal salts + streptomycin GML - glucose minimal salts + leucine GMTS - glucose minimal salts + streptomycin + tryptophan The recipient bacteria that have taken up the F' factor (called exconjugants) constitute a new strain which has growth requirements that differ from the two "parental" strains. We will name this new strain CS402E. Can grow on GMS CS402D. Can grow on GM CS402D. Can grow on GML CS402R. Can grow on GMTS CS402E.Conjugation is the transfer of genetic material, including DNA and plasmids, between bacteria, resulting in recombinant genetic material and genetic diversity. It's one of the several methods bacteria use to swap genetic material, along with transduction and transformation.

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Answer:

The mRNA's condons would desipicate

Explanation:

Answer: the structure of the protein would be different, and it could affect the protein's function

Explanation:

There are specialized neural mechanisms for the sensation of tickling, and they can be found in specific regions of the human brain.

The sensation of tickling is a unique and complex experience that involves specialized neural mechanisms. Research suggests that tickling activates certain brain regions involved in sensory processing and emotional responses. The primary somatosensory cortex, located in the parietal lobe of the brain, is responsible for processing tactile sensations from different parts of the body. It plays a role in the initial perception of tickling sensations. Additionally, the insular cortex and the anterior cingulate cortex, which are involved in processing emotional and social experiences, are also activated during tickling.

Furthermore, studies have shown that the cerebellum, a structure primarily associated with motor coordination and balance, may play a role in the perception of tickling. The cerebellum receives information about touch and movement and integrates it to produce appropriate responses. It is thought to contribute to the coordination of laughter and other motor responses during tickling.

Overall, while tickling involves various brain regions, including the primary somatosensory cortex, insular cortex, anterior cingulate cortex, and cerebellum, further research is still needed to fully understand the neural mechanisms underlying the sensation of tickling.

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Answer:

b i think

Explanation:

Cycle does the level of progesterone in the blood increase most rapidly is luteal or secretary phase

Progesterone is in the class of medication called as progestine and it is the female hormones and it work as part of hormones replacement therapy by decreasing the amount of estrogen in the uterus and this phase always occur from day 14 to day 28 of the cycle and progesterone stimulated by LH is the dominant hormone during this phase to prepare the corpus luteum and the endometrium foe possible fertilized ovum implantation and progesterone level rises after ovulation and peak five to nine days your luteal phase

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Answer:

the answer is A decrease in food supply and prediation.

The correct answer is (c) The opportunity cost of producing 1 unit of Clothing for Ukraine is 3/2 (1.5) units of Food. The opportunity cost represents the amount of one good that must be sacrificed in order to produce one additional unit of another good.

In this case, the production possibility frontier for Ukraine is given by the equation

120 = 2F + 3C, where F represents units of Food and C represents units of Clothing.

To calculate the opportunity cost of producing 1 unit of Clothing, we need to determine the rate at which Food production must be reduced. By rearranging the equation, we can express the amount of Food produced in terms of Clothing:

F = (120 - 3C)/2.

To find the opportunity cost, we calculate the change in Food production when Clothing production increases by 1 unit:

ΔF/ΔC

Taking the derivative of the Food equation with respect to Clothing, we get

ΔF/ΔC = -3/2.

This means that for each additional unit of Clothing produced, Ukraine must reduce Food production by 3/2 units (1.5 units). Therefore, the correct answer is (c) The opportunity cost of producing 1 unit of Clothing for Ukraine is 3/2 (1.5) units of Food.

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Explanation:

adaptation sounds like having longer legs

lizards that had longer legs had more access to food

so

they had more chances to mate

making kids with longer legs

(a) Approximately 0.0401 or 4.01% of pregnancies last more than 269 days.

(b) Approximately 0.6247 or 62.47% of pregnancies last between 243 and 259 days.

(c) The probability is 0.1587 or 15.87%.

(d) Since this is less than 0.05, the probability of a "very preterm" baby is less than 0.05. Therefore, "very preterm" babies are considered unusual.

To solve these problems, we can use the standard normal distribution and z-scores.

(a) To find the proportion of pregnancies that last more than 269 days, we need to calculate the area under the normal curve to the right of 269. First, we calculate the z-score:

z = (269 - u) / o = (269 - 255) / 8 = 14 / 8 = 1.75

Looking up the z-score of 1.75 in the standard normal distribution table, we find that the corresponding area to the left is approximately 0.9599. Since we want the proportion to the right of 269, we subtract this value from 1:

Proportion = 1 - 0.9599 = 0.0401

Therefore, approximately 0.0401 or 4.01% of pregnancies last more than 269 days.

(b) To find the proportion of pregnancies that last between 243 and 259 days, we need to calculate the area under the normal curve between these two values. We calculate the z-scores for both values:

z1 = (243 - u) / o = (243 - 255) / 8 = -12 / 8 = -1.5

z2 = (259 - u) / o = (259 - 255) / 8 = 4 / 8 = 0.5

Using the standard normal distribution table, we find the area to the left of z1 (-1.5) is approximately 0.0668, and the area to the left of z2 (0.5) is approximately 0.6915. To find the area between these two z-scores, we subtract the smaller area from the larger area:

Proportion = 0.6915 - 0.0668 = 0.6247

Therefore, approximately 0.6247 or 62.47% of pregnancies last between 243 and 259 days.

(c) To find the probability that a randomly selected pregnancy lasts no more than 247 days, we calculate the z-score:

z = (247 - u) / o = (247 - 255) / 8 = -8 / 8 = -1

Looking up the z-score of -1 in the standard normal distribution table, we find the corresponding area to the left is approximately 0.1587. Therefore, the probability is 0.1587 or 15.87%.

(d) To determine if "very preterm" babies (gestation period less than 237 days) are unusual, we calculate the z-score:

z = (237 - u) / o = (237 - 255) / 8 = -18 / 8 = -2.25

Looking up the z-score of -2.25 in the standard normal distribution table, we find the corresponding area to the left is approximately 0.0122. Since this is less than 0.05, the probability of a "very preterm" baby is less than 0.05. Therefore, "very preterm" babies are considered unusual.

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Answer:

The effects of tobacco smoke on the respiratory system include: irritation of the trachea (windpipe) and larynx (voice box) reduced lung function and breathlessness due to swelling and narrowing of the lung airways and excess mucus in the lung passages.

Answer:

d. The ovaries receive blood from the ovarian and uterine arteries.

Explanation:

All the other options are correct except option D.

The ovary is only supplied with oxygenated blood from the ovarian arteries. The uterine arteries supply blood to the uterus alone.

The examples of survival outcomes are "Time until acute lymphoblastic leukemia relapse" and "Time until death or stroke." These examples involve measuring the duration until a specific event occurs, making them survival outcomes.

They are particularly relevant in medical research, where understanding the time to relapse or the time until death or stroke can provide valuable insights into disease progression, treatment effectiveness, and patient prognosis.

In the case of acute lymphoblastic leukemia, tracking the time until relapse helps researchers and clinicians assess the efficacy of treatment protocols and identify potential factors influencing disease recurrence. Similarly, studying the time until death or stroke allows for the evaluation of risk factors, treatment interventions, and survival rates in various populations.

"Time worked per week on BIOS 6601 course" does not represent a survival outcome as it pertains to the amount of time spent on a course, which is not directly related to health or mortality. Additionally, "Race" refers to categorizing individuals based on their racial background and does not inherently involve survival outcomes.

Survival outcomes focus on measuring and analyzing the duration until specific events occur, providing valuable information for medical and health-related research.

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