Q: What are critical for erectile health?
Options:
- (A) fur and fat
- (B) Energy.
- (C) Energy
- (D) sweating
- (E) exercise
- (F) arteries
- (G) strength
- (H) a cuticle
A: So, my chain of thought: Arteries generally carry oxygen-rich blood. Oxygen-rich blood is critical for erectile health. Arteries are critical for erectile health. The answer is (F).

Q: What has a water vascular system with tube feet?
Options:
- (A) humans
- (B) blastoids
- (C) bushes
- (D) orchids
- (E) Most plants
- (F) ferns
- (G) bacteria
- (H) the Sun
A: So, my chain of thought: Echinoderms have a unique water vascular system with tube feet. Echinoderms in the diorama include the crinoids and blastoids. Blastoids have a unique water vascular system with tube feet. The answer is (B).

Q: What produces a diploid zygote?
Options:
- (A) salamanders
- (B) Plant reproduction
- (C) peachleaf willow
- (D) permineralization
- (E) sexual reproduction
- (F) Veins and arteries.
- (G) Chlorophyll
- (H) Most plants
A:
So, my chain of thought: Fertilization of gametes produces a diploid zygote. Sexual reproduction requires formation of gametes, followed by fertilization. Sexual reproduction produces a diploid zygote. The answer is (E).