Conifers, cycads, ginkgos, and gnetophytes are all ______. Fill in the blank(s) with the appropriate word(s)
ANSWER: gymnosperms
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Sporopollenin is:
A. a tough protective covering on spores B. pollen that is produced in a sporophyte C. the conversion of pollen to spores D. a capsule housing pollen E. All of the other choices provided are incorrect
Smallpox
A. has been eliminated as a naturally occurring infection in human beings. B. still occasionally occurs in third world countries. C. probably only had a human reservoir. D. was dealt with by vaccination. E. has been eliminated as a naturally occurring infection in human beings, AND was dealt with by vaccination.
Both marine fish and marine mammals have body fluids with a lower salt concentration. However, unlike fish, marine mammals do not drink seawater, although they do swallow some with their food. How are marine mammals able to maintain their internal supply of water?
What will be an ideal response?
Having a fever of 100 oF can help you fight off infections.
a. true b. false