BIOLOGY HIGH SCHOOL

A river area is shown on the topographic map. Four riverbank areas are labeled on the map.Which two riverbanks are the steepest?

W and X

Y and Z

X and Y

W and Z

Answers

Answer 1
Answer:

Answer:

X and Y

Explanation:

because this riverbanks have lines that are close together, so they would be the steepest.

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Proteins have a variety of functions within a living cell. Describe at least three of the possible functions of proteins, and explain how proteins can be so diverse when there are only a limited number of different amino acids.

Answers

anonymous  3 years agoProteins are involved in almost all of the cell's functions. They can act as: Transportation: they can transport hydrophobic molecules in blood for example Regulation: protein hormones and enzymes Receptor: can act as receptors on cell surface and in the subsequent signal transduction (G-protein for instance) It is true that all proteins are made up of up to 20 amino acids, but there are several reasons for their diverse actions: -One reason is the possible sequence and number of amino acids: Met-Ser-His is different from Met-His-Ser for example. Besides, you have different chain length, for a protein is made up of long chain of polypeptide (longer than 50-70 amino acids) and can have any of the 20 amino acids with repetition, so using simple probability, this can provide up to practically unlimited combination with proteins that have chains of thousands of amino acids. -Another very crucial reason for the diversity of protein action is the conformation. A protein passes by at least 3 conformational stages before becoming mature. The straight amino acid chain is the primary structure of the protein that can never be active. Spatial modification of this primary structure results in a secondary structure, Helix or Beta-pleated sheets (or other coiling structure), that is also inactive. Further coiling and bending of the secondary structure produce a 3-dimentional conformation that is the active form of the protein. Moreover, many proteins can undergo further conformational rearrangement and combination with other protein sub-units producing a quaternary structure.

Reproductive cells are created by _____.

Answers

Answer:

Meiosis

Explanation:

Please give me brainliest

Weasels eat arctic hares, which is the predator

Answers

the predator would be the weasel, as it hunts down the hare :)

What do goblet cells and cilia have in common? Both moisten the air. Both filter the air. Both secrete mucus. Both diffuse oxygen.

Answers

Both of them secrete mucus. The protective function of cilia in the trachea is moving the sheet of mucus that are contaminated, away from the lungs, toward the throat for swallowing.Goblet cells secrete the mucus's major components which is called the gel-forming mucins.

Answer:

The correct answer is "Both secrete mucus".

Explanation:

Goblet cells are specialized cells found mainly in the epithelial lining of intestinal and respiratory tracts, which main function is to secrete mucus by secreting gel-forming mucins. On the other hand, cilia is a protuberance found in cells that serves as a sensory organelle, which can have motility. One characteristic that cilia and goblet cells have in common is that both secrete mucus. Cilia is found in airway cells and helps to move mucus up and out of the lungs.

How are amino acids put together

Answers

Amino acids are put together by peptide bonds, thus creating a long chain, if you are wondering how peptide bonds are formed it is by biochemically reactions that will extract a water molecule as it joins the amino group of one amino acid to the carboxyl group of a neighboring amino acid.

During a menstrual cycle, what is the purpose of the uterine lining buildup? dirty 230

Answers

If the egg is fertilised the embryo plants itself in the uterine lining. Without this it would not survive
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