Which of the following results from an uncontrollable growth of abnormal cells?
a. complex disease
b. chromosomal disease
c. single-gene disease
d. immune disorder

A. complex disease

Explanation:

Some of the cells exhibit loss of control over cell cycle and become abnormal. These abnormal cells undergo uncontrollable growth due to absence of regulation over cell cycle / cell division. And uncontrolled growth of abnormal cells form a mass of cells called as tumor and can lead to cancer. Cancer can occur due to genetic as well as environmental factors and hence, is a complex disease.

we would need to see the picture to answer it

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.