In the past, African elephants have been hunted for their tusks. Over time, the number of tuskless elephants has increased while the number of elephants with tusks has decreased. What is the most likely explanation for the increase in the number of tuskless elephants? a

Fewer elephants with tusks survived to reproduce.

b

The gene for tusks has become recessive over time.

c

The hunting of elephants resulted in genetic mutation of the tusk gene.

d

Elephants began to lose their tusks because of climate changes.

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;

just finished the test, the answer is d, greg is the least cost-effective because he charges the most for the project

the answers are as following:

1. c. double helix, nucleosome, coil, supercoil, chromosome

2. b. g2 phase, preparation for mitosis

3. d. interphase consists of the g1, s, and g2 phases

4. c. metaphase

5. a. chromosomes are duplicated before cell division so that each new daughter cell has a complete set