Ques and Ans: What stimulates the reproductive system to form male organs in growth?
Options:
- (A) Chemical energy
- (B) barnacles
- (C) Electrical energy
- (D) a doorbell
- (E) sensory neurons
- (F) peachleaf willow
- (G) Veins and arteries.
- (H) male hormones
(H)
Explanation for the Ans above: [[Testosterone stimulates the reproductive organs to develop into male organs. Androgens are male hormones, like testosterone. Male hormones stimulated the reproductive organs to develop into male organs.]]

Ques and Ans: What feeds on plankton and nonliving organic matter?
Options:
- (A) bacteria
- (B) barnacles
- (C) animals
- (D) sharks
- (E) pythons
- (F) graptolites
- (G) molluscs
- (H) bears
(G)
Explanation for the Ans above: [[Bivalves feed on plankton and nonliving organic matter. Bivalve molluscs are very common. Molluscs feed on plankton and nonliving organic matter.]]

Ques and Ans: What wets the skin, and when it evaporates, it cools the body?
Options:
- (A) heat energy
- (B) acetic acid
- (C) Air conditioner
- (D) salt and water.
- (E) Skin oil
- (F) water vapor
- (G) Perspiration
- (H) A towel
(G)
Explanation for the Ans above:
[[Sweat wets the skin, and when it evaporates, it cools the body. Perspiration There are about 2 million sweat glands in the average human body. Perspiration wets the skin, and when it evaporates, it cools the body.]]