describe the interaction between the digestive and circulatory system of the earthworm

1. which statement is true regarding monocytes? a. they digest pathogens. b. they produce antibodies against cancerous cells. c. they have a granular appearance under a microscope. d. they produce antibodies against microorganisms.

Growth of chest hair, deepening of the voice, and muscle growth are secondary sex characteristics. which most likely affects the development of these traits? testes ovaries prostate gland vulva

Explain why phospholipid molecules form a bilayer. (3 marks)