Ans: (E)
Question: What causes cell walls to relax?
Options:
- (A) exercise
- (B) sweating
- (C) adding heat
- (D) Energy
- (E) dilation
- (F) heat or cold
- (G) heat
- (H) Dehydration
CoT: Dilation occurs when cell walls relax. When oxygen level decreases, dilatation of the blood vessels occurs. Decreased oxygen levels cause blood vessels to dilate and cell walls to relax.




Ans: (A)
Question: What are the form of the genetic material of a cell during mitosis?
Options:
- (A) chromosomes
- (B) graptolites
- (C) fur and fat
- (D) peachleaf willow
- (E) pollen
- (F) Leptospirosis
- (G) animals
- (H) it can be seen
CoT: Chromosomes are the form of the genetic material of a cell during cell division. Mitosis is cell division. Chromosomes are the form of the genetic material of a cell during mitosis.




Ans: (B)
Question: What are a major food source for other organisms, including humans?
Options:
- (A) Earthworms
- (B) Soft-bodied invertebrates
- (C) Fully cooking the oysters
- (D) absorb light energy
- (E) remains of prehistoric life
- (F) members of their own species
- (G) Humans
- (H) Lawns
CoT: Mollusks are a major food source for other organisms, including humans. Mollusks are soft-bodied invertebrates. Soft-bodied invertebrates are a major food source for other organisms, including humans.




Ans: (D)

Question: Mussels have what?
Options:
- (A) seaweed
- (B) arms
- (C) Energy
- (D) a shell
- (E) warmth
- (F) bacteria
- (G) Length
- (H) legs
CoT: Most mollusks have shells. Mussels are bivalve mollusks. Mussels have shells.