Answer:
The correct answer is option d.
Explanation:
The non-genotoxic carcinogens lead to cancer not by amending the genotype, that is, they do not cause mutations straightforwardly. In spite, they result in cancers due to secondary mechanisms that are not associated with direct damage of the gene. They influence either the growth factors or the hormones related to growth.
This is an example of natural selection. The finches with the most ideal beaks survive because the environment they live in allows them to gather resources more easily than other species.
Enzymes are biological catalysts which speed up the speed of reaction by lowering the activation energy without itself being consumed for e.g to digest proteins there are dfrn enzymes and to digest carbohydrates there are dfrn enzymes every enzyme is specific in its function
Answer:
Option C
Explanation:
Let the allele for long fin trait be "L" and the allele for short fin trait be "l"
Given L is dominant over l
If he crosses a long fish and short fin to produce three fourth long fins and one fourth short fins, it is not confirmed that the long fin species are homozygous as represented in the cross below
Ll * Ll
LL, Ll. Ll, ll
The two parent species are long (but not homozygous). Hence, option A is incorrect
However, if this test cross is carried out several times, the recessive trait may disappear thereby producing only homozygous long finned species.
Hence, option C is correct
