Answer:
Due to no resistance.
Explanation:
Most mosquitoes perish when DDT chemical was sprayed the first time because these mosquitoes are vulnerable to the DDT chemical and there is no resistance present in their body against this chemical. DDT chemical is an insecticide which is used against insects or pests that causes damage to human, organisms and crops. DDT was first synthesized in 1874 by the Austrian chemist named Othmar Zeidler.
<span>The only traits that can be acted upon by natural selection are those that are controlled by ___________________</span>
Answer:
b prostate gland
Explanation:
The prostate gland's main function is to secrete prostate fluid, one of the components of semen. The prostate is also a common site of cancer.
Based on DNA sequences, it is believed that changes in nucleotide sequence between two species are equivalent to the time that has elapsed since the two species diverged from their common ancestor. Gene sequencing is being used in addition to morphology to determine evolutionary relationships between organism. Homologous sequences show greater evolutionary relationship
Replicate/look exactly like their parent, since they all have the seems genes, and one parent.
