Amino acids are attached to the __________ of a tRNA. 3' terminus D loop variable loop anticodon triplet

Answer:

fibers or tubules.

Explanation:

Answer:

It should be A

Explanation:

You can remember Phenotype by remembering physical. and genotype by remembering gene. Phenotypes can be changed like if you get a scar. but it does not affect your genes.

Answer:

A. A genotype is an organism's allele combination. A phenotype is the physical appearance of a trait in an organism, which may be influenced by the organism’s experiences.

Explanation:

on edge

Answer:

All living things share characteristic of life, which include movement reproduction and respiration etc..

Explanation:

living thing share common characteristic ..we see many living things around us. living things aslo have basic needs such as air,water food and habitat,we are required for their survival.therefor living things are the things that alive ..

When high levels of plasma calcium occur, the nurse would be aware that the hormone calcitonin is typically secreted.

Increased calcium excretion: Calcitonin promotes the excretion of calcium by the kidneys, reducing reabsorption and enhancing its elimination through urine.

By exerting these effects, calcitonin helps to regulate and lower plasma calcium levels when they are elevated. It works in opposition to another hormone called parathyroid hormone (PTH), which increases plasma calcium levels when they are low.

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Answer:

Homo erectus. it first spread through africa and eurasia.

pls mark brainliest

Explanation:

Answer:upright man

Explanation:Upright man

Homo erectus

Homo erectus appeared about 2 million years ago and, in several early migrations, it spread throughout Africa (where it is dubbed Homo ergaster) and Eurasia. It was likely the first human species to live in a hunter-gatherer society and to control fire

Answer:

a terrestrial habitat means life on land

Answer: I need more clarification to give a proper answer. I have nothing to base on..

Explanation: Edit this question, and add more info.

Answer:

activators and inhibitors

Explanation:

Explanation:

One of a number of alternative forms of the same gene occupying a given position, or locus, on a chromosome is allele.

Explanation:

one of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome

Answer:

B. Extinct

Explanation:

Exctinct means no longer exists.

In this case, fossils provide the proof that exctinct animals species used to exist but no longer do. For example, dinosaurs are the prime example of this.

Gene expression can be regulated at multiple levels in eukaryotes, including the passage of mRNA through the nuclear membrane, destruction of the mRNA, and the rate of protein synthesis. Therefore, the correct answer is E) A, B, and C.

In eukaryotes, gene expression can be regulated at various stages to control the production of proteins. Firstly, regulation can occur at the level of mRNA transport through the nuclear membrane (option A). Certain mRNA molecules may require specific signals or factors to be transported out of the nucleus for translation. Secondly, regulation can occur through the destruction of mRNA (option B). mRNA molecules can be targeted for degradation, preventing their translation into proteins. Lastly, regulation can occur at the level of protein synthesis (option C). Factors such as translational machinery availability and regulatory proteins can influence the rate of protein synthesis from mRNA. By controlling gene expression at these different levels, eukaryotic cells can finely tune protein production in response to various stimuli and ensure proper cellular function.

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Answer:

It is important for gametes to have half as many chromosomes as normal body cells because when the gametes go through fertilization and create the zygote, it will have the correct number of chromosomes.

Explanation:

The cytotoxic T cell activation by cell-mediated immunity results in the lysis and apoptosis of infected cells. The mechanism of cell-mediated immunity is crucial in the defense against intracellular organisms like viruses and bacteria that infect cells.

The immune response begins when an antigen-presenting cell, or APC, presents an antigen to a T helper cell. T helper cells help activate cytotoxic T cells and other immune cells. Once cytotoxic T cells recognize the antigens presented by APC, they release proteins called perforins and proteases.

Perforins make holes in the cell membrane of infected cells. Proteases enter through the holes and break down proteins inside the cell. In the end, the infected cell undergoes lysis and apoptosis. This mechanism is crucial in the defense against intracellular pathogens such as viruses, as it destroys the infected cells, preventing the spread of the infection.

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Answer:

C. Genelling research

Explanation:

Not sure if it's correct but I hope this was helpful, Have a Great Day!!

Answer:

question no 1 :This would make it hard for the body to work properly because all our systems are interconnected.

2:

All our systems are important in keeping our bodies happy and healthy

3 :Integumentary System

4:Nervous System

Explanation:

5:Skeletal System

6:Integumentary System

Based on the knowledge of Biology, the correct answers go thus:

In conclusion, we can conclude that the correct answers are as given above.

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Proteins whose conformations change when bound to an effector molecule are called **allosteric proteins**.

Allosteric proteins are a type of **regulatory proteins** that can change their conformation when an effector molecule binds to their specific site. This binding causes a structural change in the protein, affecting its function, either by activating or inhibiting it. **Enzymes** can also be allosteric proteins, as their activity can be regulated through this mechanism. In contrast, **activator proteins** and **inhibitory proteins** are involved in the regulation of gene expression, not through conformational changes caused by effector molecules.

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The statement "In a microscopic field showing an artery and its corresponding vein, you can easily distinguish the two because veins have thinner walls and are irregular in shape" is true.

Here's a concise explanation:

1. Arteries and veins are two types of blood vessels that have distinct characteristics.
2. Arteries carry oxygenated blood away from the heart, while veins return deoxygenated blood to the heart.
3. Arteries have thicker walls due to their function of transporting blood under high pressure, as they need to withstand the pressure exerted by the pumping heart.
4. Veins have thinner walls, as they carry blood at a lower pressure, and they also have valves to prevent backflow of blood.
5. When observed under a microscope, you can distinguish an artery from a vein due to the artery's thicker, more uniform walls, and the vein's thinner walls and irregular shape.

These differences between arteries and veins allow them to fulfill their respective functions in the circulatory system effectively.

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Answer:

the body is an organ

Explanation:

organ

Answer:

During exercise your cells need energy to function. in order to do so they harness it through ATP. In order to get ATP the cells convert it to ADP usually through aerobic respiration. Aerobic respiration requires oxygen to function and the cells will use up all their oxygen stores for it. Cells will get more oxygen when the exercise has been completed through the pulmonary system delivering oxygenated blood to the cells and taking away the used CO2 rich blood.

Answer:

Hello!What happens with ATP, NADPH, and sugar when you increase the temperature is that the mixture will INCREASE.

Explanation:

Hope this helps! :)-jade

The concentration of ATP, NADPH, and sugar will increase if temperature increases.

The rate of photosynthesis is depends upon several factors such as Light intensity and Temperature.

Therefore,  the concentration of ATP, NADPH, and sugar will increase if temperature increases.

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The twisted ladder shape of the DNA molecule is commonly referred to as a double helix.

This shape arises from the structure of the molecule, which consists of two strands of nucleotides that are twisted around each other. Each nucleotide consists of a sugar molecule, a phosphate group, and a nitrogenous base. The sugar and phosphate groups form the backbone of the DNA strand, while the nitrogenous bases are attached to the sugar molecules and project inward, forming the rungs of the ladder. The two strands are held together by hydrogen bonds between the nitrogenous bases, with adenine (A) always pairing with thymine (T) and guanine (G) always pairing with cytosine (C).

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Answer:

through diffusion

Explanation:

I think so that by diffusion this occurs

Answer:

Pollinators which may be insects, birds, or other animals would reach the flower by being stimulated through their sense of smell. The scent from flowers gets spread through the air everywhere because the scent producing molecules are low weight. The low molecular weight help them spread and diffuse everywhere

hope it helped

Homeostasis is an essential process that ensures the survival of living organisms in changing environments.

The process by which organisms maintain a stable internal environment despite changes in external conditions is called homeostasis.

Homeostasis is the process by which organisms maintain a stable internal environment despite changes in external conditions. This is an essential process for the survival of living organisms.

The internal environment is the environment inside the body of an organism. It includes the cells, tissues, and organs. The external environment is the environment outside the body of an organism. It includes factors such as temperature, humidity, light, and nutrients.

Organisms are capable of regulating their internal environment to maintain a stable and optimal environment for survival. This is achieved through a range of mechanisms such as sweating, shivering, and hormonal regulation.

The maintenance of homeostasis is crucial for the survival of living organisms. Without it, the organism's internal environment would be susceptible to changes in the external environment, leading to health problems and, in extreme cases, death.

Homeostasis is achieved through a range of complex mechanisms that involve different organs and organ systems.

These mechanisms work together to maintain a stable internal environment that is conducive to the survival of the organism.

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Answer:

C. protein

Explanation:

I hope it helps

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Photosynthesis occurs in the chloroplast, an organelle specific to plant cells. The light reactions of photosynthesis occur in the thylakoid membranes of the chloroplast. Electron carrier molecules are arranged in electron transport chains that produce ATP and NADPH, which temporarily store chemical energy.

Explanation:

Absolute dating is required to determine the relative age of animals based on their fossils. Specific groups of organisms have followed one another in a definite sequence through the Earth's history.

Answer:

C

Explanation:

incomplete dominance

Answer:

The Viking tubing is meant to be the cell membrane. Glucose manages to move out of the bag and into the surrounding water but starch does not. Not all substances can pass through the cell membrane; some molecules, like starch are too large. The cell membrane is called selectively permeable because of this.

Explanation: