Answer:
23 chromosomes
Explanation:
Human sex cell (either male or female sex cell) is haploid and consists of half of the total number of chromosomes within a cell.
So if there are 46 chromosomes in a cell, a human egg will have exactly half of it i.e 23 chromosomes.
During mating, 23 chromosomes are donated by both father and mother to their offspring (diploid zygote) to constitute 46 chromosomes set.
Answer:
The freshwater is hypotonic to the fish
Explanation:
<em>A marine fish is adapted to living in water that is salty.</em>
<em>The fish will not survive because the freshwater would be hypotonic to the body of the fish and as such, excess water would enter its body which will lead to its death. The cells that make up the body of the fish will take-in excess water and lyse, leading to the death of the fish itself.</em>
Answer:
The correct answer is c. The legs of a bird and the legs of an insect
Explanation:
The structures that are driven from a common ancestor are called homologous structures. They can look different superficially but they are related developmentally. Homologous structures are formed by divergent evolution for example forelimbs of bat and humans are homologous structures.
So it does not mean that homologous structures of two different animals perform the same function. So here the pair which is least likely to share the homologous structure is the legs of a bird and the legs of an insect because it is not derived from same common ancestor and does not show homology.
Of about 3-4 days in most cases. With severe damage it can take up to 30.