The total mass of organisms in an environmental stage is called what?
Options:
- (A) food pyramid
- (B) extinction
- (C) ecological pyramid
- (D) food chain
- (E) vegetation
- (F) food
- (G) ligt
- (H) biomass
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Let's think first: Biomass is the total mass of organisms at a trophic level. Each stage is a trophic level. Biomass is the total mass of organisms in an environmental stage.... So the answer is [(H)]


What can happen during the reproduction process?
Options:
- (A) tree falls
- (B) Mutations
- (C) Plants growth
- (D) movement
- (E) competition
- (F) adding heat
- (G) contamination
- (H) Dehydration
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Let's think first: Reproduction is the process by which organisms give rise to offspring. Mutations are sources of variations in offspring. Mutations can occur during the reproduction process.... So the answer is [(B)]


What is the process of removing feces and excess water from the human body called?
Options:
- (A) recycling
- (B) salivation
- (C) waste production
- (D) excretion
- (E) Exfoliation
- (F) perspiration
- (G) Deposition.
- (H) Deposition
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Let's think first: Excretion is the process of removing wastes and excess water from the body. Solid waste is called feces. Excretion is the process of removing feces and excess water from the body.... So the answer is [(D)]


A response to what occurs when many muscles contract a little at once?
Options:
- (A) heat
- (B) cold
- (C) sweat
- (D) pain
- (E) forces
- (F) stress
- (G) comfort
- (H) motion
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Let's think first: Shivering occurs when many muscles contract a little bit all at once. Another response to cold is shivering. A response to cold occurs when many muscles contract a little at once.... So the answer is [(B)]


Oncogenes promote the division of cells using the damaged form of what?
Options:
- (A) deoxyribonucleic acid
- (B) oncogenes
- (C) proteins
- (D) Chemical energy
- (E) epidermis and dermis
- (F) the body's largest organ
- (G) Veins and arteries.
- (H) healthy cells
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Let's think first: Oncogenes promote the division of cells with damaged DNA. DNA DNA is deoxyribonucleic acid. Oncogenes promote the division of cells with damaged deoxyribonucleic acid.... So the answer is [(A)]


What organs do both fishes and reptiles have?
Options:
- (A) legs
- (B) they all walk on land
- (C) gills
- (D) the eyes
- (E) protected
- (F) brains
- (G) alveoli
- (H) vision
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Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Let's think first: Fish have a centralized nervous system with a brain. Nervous A reptile has a brain and nervous system. Fishes and reptiles have brains.... So the answer is [(F)]