q: Roundworms reproduce using meiosis and what?
Options:
- (A) karyogamy
- (B) pollen
- (C) survive
- (D) reproduce
- (E) allow growth
- (F) Energy
- (G) Leptospirosis
- (H) seeds
a: (A)... Explanation: Roundworms reproduce sexually. Sexual reproduction involves karyogamy and meiosis. Roundworms reproduce using karyogamy and meiosis. That's why the answer is (A).

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)... Explanation: Centrioles are organelles involved in cell division. Mitosis is cell division. Centrioles are organelles involved in mitosis. That's why the answer is (F).

q: What provides protection for internal organs?
Options:
- (A) fur
- (B) cuticle
- (C) ribs
- (D) skin
- (E) plasma
- (F) brain
- (G) coats
- (H) fat
a: (C)... Explanation: Bone provides protection for soft tissues and internal organs. Vertebrae, ribs, appendages, and the jaw are endoskeletal bone. Ribs provide protection for internal organs. That's why the answer is (C).

q: What do dogs use to mark their territory?
Options:
- (A) water
- (B) Chemicals
- (C) layers of fat
- (D) food
- (E) Animal fur
- (F) heat energy
- (G) Scratches
- (H) heat produced
a:
(B)... Explanation: Male dogs use pheromones in urine to mark their territory. Pheromones are a sub-category of semiochemicals. Male dogs use chemicals to mark their territory. That's why the answer is (B).