Question

22) As animals moved out of the water, they had to adapt in order to avoid water loss. Which of the following is NOT an example of how animals have adapted to avoid water loss? A. Amniotic egg B. thicker skin C. more developed lungs D. melanin production

23) New strains of influenza originate each year because A. segments of different viruses recombine within a mutually infected cell of a pig B. new strains of influenza do NOT form each year because the DNA virus rarely mutates C. the gp120 on its surface mutates into a new form D. the virus evolved to infect new cell types each year

24) BRCA1 is a mutated version of a ____________________of gene which increases one’s chances of developing breast cancer? A. oncogene B.kinase C. protooncogene D. tumor suppressor gene

Answer 1

22d. melanin production

Amniotic eggs, thicker skin and more developed are the adaptations for terrestrial organisms but Melanin is not related to it as it is the pigment which causes the skin colour.

23D. the virus evolved to infect new cell types each year

Influenza viruses constantly change through a process called antigenic drift. This is the random accumulation of mutations in the haemagglutinin (HA).

24d. Tumour suppressor gene

BRCA1 is a human tumour suppressor gene (also known as a caretaker gene) and is responsible for repairing DNA