Ques:[ _carry signals that control sexual development and reproduction
Options:
- (A) sex hormones
- (B) electricity
- (C) nucleic acid
- (D) Most plants
- (E) animals
- (F) genes
- (G) dendrites
- (H) photons]
Ans:[Sex hormones are chemical messengers that control sexual development and reproduction. Chemical messengers carry signals from one nerve branch to another. Sex hormones carry signals that control sexual development and reproduction.
(A)]

Ques:[Which needs fungi need to survive?
Options:
- (A) Energy
- (B) food
- (C) alveoli
- (D) oxygen
- (E) peat
- (F) bushes
- (G) bacteria
- (H) trees]
Ans:[Oxygen is essential for cellular respiration for all aerobic organisms. Fungi are aerobic organisms. Oxygen is essential for fungi cellular respiration.
(D)]

Ques:[In what way do viruses not proliferate?
Options:
- (A) adding heat
- (B) at or near the margins
- (C) They may not survive.
- (D) dry conditions
- (E) heat or cold
- (F) by indirect light
- (G) Localized damage
- (H) binary division]
Ans:[Populations of viruses do not grow through cell division because they are not cells. Cells, the basic units of every living organism, proliferate by binary division. Viruses do not proliferate via binary division.
(H)]

Ques:[What is required before a chemical change?
Options:
- (A) kinetic energy
- (B) energy usage
- (C) activation push
- (D) activation energy
- (E) activation switch
- (F) activation power
- (G) Burning fuel and air
- (H) Evaporation]
Ans:
[All chemical reactions require activation energy to get started. Chemical changes are a result of chemical reactions. Activation energy must be used before a chemical change happens.
(D)]