The banded tetra, a kind of fish found in tropical streams, is a(n) _______ species because it provides nearly all the necessary phosphorus to the other species in its community, and its disappearance from the community would have detrimental effects on the other species that live there.
a. invasive
b. foundation
c. pioneer
d. keystone
d. keystone
The banded tetra, a kind of fish found in tropical streams, is a keystone species because it provides nearly all the necessary phosphorus to the other species in its community, and its disappearance from the community would have detrimental effects on the other species that live there.
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The fluid mosaic model proposed by Singer and Nicolson in 1972 explained that
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What feature of both true mosses and ferns makes it most surprising that they can survive for many generations in dry deserts?
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Which of the following groups includes both spiders and horseshoe crabs?
A) millipedes B) crustaceans C) chelicerates D) insects
How is the timing of gene expression controlled in the lytic cycle?
What will be an ideal response?