The endosperm of a plant
a. is the food supply for the new sporophyte
plant.
b. is composed of haploid tissue.
c. protects the young embryo within a seed.
d. provides a connection between the ovary of
a flower and a developing seed.
e. produces sperm cells
A
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Explain what CAUTION means as the acronym for the warning signs of cancer.
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What is untrue of Yersinia pestis?
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Many times species are composed of networks of distinct populations called metapopulations. When do metapopulations occur?
A. When suitable habitat is patchily distributed and separated by areas of unsuitable habitat B. When a population is large and uniformly distributed C. When a population in poor habitat continually sends out dispersers to bolster populations in better habitats D. When a population in a better habitat does not send out colonizers into less suitable habitats