Which layer in the blood vessel is composed of smooth muscle, allowing it to dilate or constrict?

b. Tunica media

Explanation: is correct/post protected

i am positive it is c. condensing but i may be wrong

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.