he invertebrate group most closely related to the vertebrates is the
A. Echinodermata.
B. Urochordata.
C. Cephalochordata.
D. Ophiouroidea.
E. Notochordata.
B. Urochordata.
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Which determines the chemical and physical properties of an atom of an element?
A. Electron B. Neutron C. Atomic weight D. Atomic number
Historical data suggest that snowshoe-hare population cycles are caused by Canada lynx predation. Modern research has ________
a. confirmed this hypothesis and shown that lynx starve after having depressed the hare population b. demonstrated that snowshoe hares cycle even in captivity, indicating a genetic basis for variations in density c. as yet been unable to explain the cyclic changes in hare density d. shown that multiple factors, such as raptor predation and plant interactions produce oscillations even in the absence of lynx
What are some of the similarities and differences between green algae and plants?
What will be an ideal response?
According to the Hardy-Weinberg principle, if 75% of the alleles in the gene pool are A1 and 25% are A2, what is the proportion of individuals with genotype A1A2 in this population?
A) 0.1875 B) 0.375 C) 0.0625 D) 0.5625 E) 0.025