Solution idea: Centrioles are organelles involved in cell division. Mitosis is cell division. Centrioles are organelles involved in mitosis.
Q: What is involved in the cellular process of mitosis?
Options:
- (A) Most plants
- (B) layers of fat
- (C) A computer
- (D) Energy.
- (E) Chemical energy
- (F) centrioles
- (G) Energy
- (H) animals
A: (F)

Solution idea: Ejaculation occurs when muscle contractions propel sperm from the epididymes. Bacteria usually cause epididymitis. Ejaculation of sperm can be inhibited by bacterial infection.
Q: Bacterial infection can inhibit ejaculation of what?
Options:
- (A) babies
- (B) sperm
- (C) sugar
- (D) animals
- (E) erection
- (F) eggs
- (G) humans
- (H) pregnancy
A: (B)

Solution idea: Adult sponges produce eggs and sperm. Sponges are the most primitive multicellular animals. The most primitive multi-cellular animals produce eggs and sperm.
Q: The most primitive multi-cellular animals produce what?
Options:
- (A) Electrical energy
- (B) eggs and sperm
- (C) harmful substances
- (D) scarce resources
- (E) Organic compounds
- (F) Chemical energy
- (G) fur and fat
- (H) aerobic capacity
A: (B)

Solution idea: Reproduction is the process by which living things give rise to offspring. Seed refers to offspring, children. Living things use reproduction to have children.
Q: How do living things have children?
Options:
- (A) death
- (B) people
- (C) humans
- (D) babies
- (E) it needs them
- (F) reproduction
- (G) mitosis
- (H) production
A: (F)