Keith is observing a slide of an amoeba under a compound microscope. he places a stained fine particle of yeast near the amoeba. he observes that the amoeba is engulfing this particle by extending its pseudopodia. which process is the amoeba exhibiting?
a. pinocytosis
b. exocytosis
c. phagocytosis
d. receptor mediated endocytosis

c. phagocytosis

Explanation:

Phagocytosis is the process by which a living cell engulfs and ingests another cell or particles. In simple one celled organisms such as amoeba phagocytosis is a feeding mechanism. But in higher animals it is used as a defensive mechanism against the invasion of the pathogens such as bacteria and viruses. The amoeba is a simple one celled organism which consist of finger like projection called as pseudopodia which extends towards it's prey in water and it is brought inside the cell, the prey is ingested by a vacuole in the cell by the process of phagocytosis.

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.