The apparent lack of intermediate forms in the fossil record might best be explained as due to
a. disruptive selection.
b. frequency dependent selection.
c. allopatric speciation.
d. genetic drift.
e. punctuated equilibrium.
E
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Which of the following is a component of the spore—or zygote—wall (in mosses, ferns, gymnosperms, and angiosperms) and helps prevent the desiccation of these structures?
A. sporangium B. sporopollenin C. chitin D. peptidoglycan E. sporangia
True or False: The populations of all species except humans have experienced some decline during the Anthropocene period
A. true B. false
When artificial methods are used to modify living organisms to produce new compounds or perform new functions, what is this process called?
a. bioremediation b. bioradiation c. biotechnology d. biotechnicality
Describe the production of urea in the mammalian body. Where is it finally excreted?
What will be an ideal response?