Horsehair worms, in the phylum Nematomorpha, do not have a respiratory system. They are usually found in puddles of water or on damp sidewalks and patios, or they may come wiggling out of insects
These creatures have no economic importance other than being parasitic to some insects.
Based on this scenario, horsehair worms are most likely to
A) have a large surface area compared with their volume.
B) be unable to efficiently digest food.
C) use large amounts of energy.
D) have very thick bodies.
E) have a dry skin surface.
A
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A smooth pattern of variation along a geographical gradient is referred to as a ____
a. ring species b. hybrid zone c. morphological species d. cline e. cluster of subspecies
The cuticle helps a plant conserve water by ____
a. covering the stomata b. reducing a plant’s capacity for photosynthesis c. absorbing visible light d. restricting the amount of water a plant’s root absorbs e. restricting the amount of water vapor that diffuses out of aboveground parts.
What are the benefits of wetlands?
A) protection from flooding B) storage of drinking water C) increasing rate of water flow to bodies of water D) production of sediment that is useful for fertilizer
When an atom of water is irradiated it first dissociates into _____.
a) two water atoms b) an ion pair c) free radicals d) hydrogen peroxide