<span>The cell membrane acts as the gatekeeper of the cell, determining what goes in and out.</span>
Answer:
C. Population shrinks; 15 birds in the end
Explanation:
Let us understand some of the given terms;
immigration is a form of migration in which organisms comes into a territory.
emigration is a form of migration in which organisms leaves a place
population is a group of organisms of the same species
Given:
Population = 21 birds
Immigrant = 3 birds
Emigrants = 9 birds
Population change = total number of birds + immigrant - emigrants
= 21 + 3 - 9
= 15 birds
The population will shrink giving 15 birds in the end
Answer:
tRNA.
Explanation:
RNA molecule is made from the template DNA by the process of transcription. Three main different types of RNA molecule are rRNA, mRNA and tRNA.
tRNA or transfer RNA is an one of the most important RNA molecule. tRNA molecule contains the anticodon that are complementary to the codon of the RNA molecule. tRNA specifies for a particular amino acid.
Thus, the correct answer is option (C).
The answer would be C, structures A and B.
Haploid cells mean that the cells that only have half of the original chromosome number than other cells of the species. For example in human, the original chromosome number should be 46, but haploid cells only have 23 chromosomes. Haploid cells are only usually seen in reproductive cells, which means the cells used for sexual reproduction.
Since flowering plants reproduce sexually, the cells that are haploid are the sex cells. And for sex cells, they include pollen grains (male sex cell) and ovum (female sex cell). According to the picture, pollen can be found in structure B, the anther, and ovum can be found in A, the ovary.
So, your answer is C.