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blondinia [14]
3 years ago
7

in order for natural selection to take place, we must have a.one individual b.a cloned species c.the same traits d.variety in a

population
Biology
1 answer:
padilas [110]3 years ago
3 0
Natural selection can only occur because of a variety in a population. Natural selection refers to environmental factors that affect a population and causes some of the population to have more surviving offspring than others. An example is a giraffe with a longer neck will be more likely to survive and reproduce (as it can gather more food from taller trees)

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How many nucleotides are needed to code for an amino acid
ivanzaharov [21]

Answer:

Three nucleotide

Explanation:

Three nucleotides are required to code for one amino acid. There are four types of nucleotides A, T, G, C which make DNA. So a doublet of nucleotide code which involves only two nucleotide would be insufficient to code for 20 amino acids because if 4 different nucleotide is taken two at a time then it can only produce 16 amino acid(4²=16).

But if we take three-nucleotide than the number reaches 64 which is more than sufficient to code for 20 different amino acids(4³= 64). Therefore 3 nucleotides are needed to code for an amino acid.

8 0
3 years ago
Signal transduction is the process by which:
scoundrel [369]

Answer:

An extracellular molecule activates a membrane protein, which in turn activates molecules inside the cell.

Explanation:

Signal transduction may be defined as the cellular process in which the signal is transmitted into the cells. The signal transduction results in the detection of the stimuli and the effects generated in the body.

The signal transduction initiates the series of cascade for the signal transmission. The protein is activated by the extracellular molecule and activates the different molecules by the phosphorylation at the different steps of the transduction.

Thus, the correct answer is option (c).

6 0
3 years ago
Polygenic traits are determined by multiple __________ received from each parent? help please   the answer is genes
Bond [772]
Yes the answer is genes.

Polygenic traits are determined by multiple gene received from each parent.
7 0
3 years ago
What do primary consumers eat
nikklg [1K]

Grass and stuff they are herbivores

5 0
3 years ago
Which of the following statements about a typical plasma membrane is correct?a. Phospholipids are the primary component that det
nordsb [41]

Answer:

B

Explanation:

The fatty acid tails of phospholipids are hydrophobic – meaning they are ‘water-hating’. This is why they are in the middle of the bi-lipid layer of the cell membrane 'hiding' from the 'watery' environment of a cell. This poses a challenge in the diffusion of large and charged molecules across the membrane -such as sodium ions. Such molecules need transmembrane protein channels to help them cross the membrane. These are called integral proteins because they are part and parcel of the cell membrane. The cell membrane, in addition, also has glycolipids and glycoproteins on its surface that are significant in the identification of the cell by other cells.

7 0
3 years ago
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