What occurs when gametes fuse to form a diploid zygote?
Options:
- (A) permineralization
- (B) rapid expansion
- (C) competition
- (D) fertilization
- (E) photosynthesis
- (F) chromosomes
- (G) mutation
- (H) Leptospirosis
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Let's think first: Fertilization occurs when a sperm and an egg fuse to form a diploid zygote. Sperm and eggs are cells known as gametes. Fertilization occurs when gametes fuse to form a diploid zygote.... So the answer is [(D)]

What do bacteria not have, for protein production?
Options:
- (A) Acids
- (B) alleles
- (C) ribosomes
- (D) layers of fat
- (E) light energy
- (F) heat energy
- (G) Energy
- (H) Energy.
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Let's think first: Ribosomes are small organelles where proteins are made. Bacteria contain no organelles. Bacteria do not have ribosomes for protein production.... So the answer is [(C)]

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
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Let's think first: Fertilization of gametes produces a diploid zygote. Sexual reproduction requires formation of gametes, followed by fertilization. Sexual reproduction produces a diploid zygote.... So the answer is [(E)]

What can maintaining body position help you to do?
Options:
- (A) work
- (B) play
- (C) move
- (D) live
- (E) rest
- (F) Lift
- (G) ski
- (H) fly
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Let's think first: Balance is the ability to sense and maintain body position. Balance is important in skiing and balance is important in life. In order to ski, it is necessary to maintain body position.... So the answer is [(G)]

Which of these trees seasonally sheds its leaves?
Options:
- (A) gone forever
- (B) Exfoliation
- (C) Most plants
- (D) Mulberry
- (E) ligt
- (F) vegetation
- (G) Heavy rains
- (H) homogenous
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Let's think first: Plants that shed their leaves seasonally each year are called deciduous plants. Mulberry trees are deciduous. Mulberry trees seasonally shed their leaves.... So the answer is [(D)]

What are attached permanently?
Options:
- (A) Veins and arteries.
- (B) sensory neurons
- (C) barnacles
- (D) tadpoles
- (E) seahorses
- (F) alligators
- (G) adult sponges
- (H) an organism's body
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Let's think first: Adult sponges are sessile. Sessile Attached permanently, immobile. Adult sponges are attached permanently and cannot move.... So the answer is [(G)]