Marine annelids can make a swimming larvae called what?
Options:
- (A) barnacles
- (B) survive
- (C) graptolites
- (D) epidermal
- (E) Something to move
- (F) a trochophore
- (G) fertile
- (H) permineralization
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Let's think first: Adult worms go through a major transformation to develop reproductive organs. Marine annelid worms have larvae called trochophores that swim about by means of cilia. Marine annelids go through a major transformation to be able to make larvae called trochophores that swim about by means of cilia.... So the answer is [(F)]

What increases the stability of ecosystems?
Options:
- (A) overpopulation
- (B) water consumption
- (C) loose soil
- (D) Quality of life
- (E) agriculture
- (F) deforestation
- (G) ecotourism
- (H) trees
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Let's think first: Biodiversity increases the productivity and stability of ecosystems. Ecotourism, on the other hand, can help to conserve biodiversity. Ecotourism increases the stability of ecosystems.... So the answer is [(G)]

Alternation of generations allows for different methods of producing:
Options:
- (A) genders
- (B) music
- (C) Chlorophyll
- (D) trees
- (E) Plants growth
- (F) offspring
- (G) rays or beams
- (H) infection
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Let's think first: Alternation of generations allows for both asexual and sexual reproduction. Asexual reproduction gives offspring similar to parents. Alternation of generations allows for different methods of producing offspring.... So the answer is [(F)]

What is the process of breaking down food into nutrients?
Options:
- (A) recycling
- (B) food processing
- (C) digestion
- (D) bacteria
- (E) eating
- (F) hydration
- (G) Dehydration
- (H) blender
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Let's think first: Digestion is the process of breaking down food into components the body can absorb. Nutrients are absorbed by the intestines and if the walls are coated, fewer nutrients are absorbed. Digestion is the process of breaking down food into nutrients.... So the answer is [(C)]

What group of animals are a tetrapod vertebrate that produce amniotic eggs?
Options:
- (A) class Reptilia
- (B) warm-blooded
- (C) more abundant
- (D) graptolites
- (E) animals
- (F) insects
- (G) mammals
- (H) barnacles
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Let's think first: Reptiles are a class of tetrapod vertebrates that produce amniotic eggs. Reptilia contains over 7800 entries on numerous species of reptiles. Animals in the class Reptilia are a class of tetrapod vertebrates that produce amniotic eggs.... So the answer is [(A)]

_ are tetrapods.
Options:
- (A) animals
- (B) amoeba
- (C) Frogs
- (D) Length
- (E) insects
- (F) Spiders
- (G) Snakes
- (H) Birds
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Let's think first: Amphibians are the first true tetrapods, or vertebrates with four limbs. Frogs are classified as amphibians. Frogs are tetrapods.... So the answer is [(C)]