Biology, 31.07.2019 15:00 jasonoliva13
In insects, what is the adaptive significance of spiracles? in insects, what is the adaptive significance of spiracles? they dilate and constrict during flight or other types of movement, functioning as a "breathing" mechanism. they close off tracheae to minimize water loss. they are thin and highly branched, offering a large surface area for gas exchange. they open into the body cavity, allowing direct contact between hemolymph and tissues.
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Biology, 22.06.2019 02:40
How are the testes and ovaries similar? a. both produce sex cells. b. both connect internal reproductive organs to the exterior. c. both transport sex cells from their site of production. d. both store mature sex cells.
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Biology, 22.06.2019 06:20
The activity of the modern sample is 1.10 bq . how long does that measurement take?
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Biology, 22.06.2019 08:00
In which state was more than 100 billion tons of coal mined in 2005?
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Biology, 22.06.2019 15:00
Which of the following must be true for a fossil organism to be useful as an index fossil? a. the fossil organism must be widespread geographically. b. the fossil organism must be abundant. c. the fossil organism must be limited to a short span of geologic time. d. all of the above.
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In insects, what is the adaptive significance of spiracles? in insects, what is the adaptive signif...
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