Which one of the following is an advantage of using the fossil record to obtain information about our evolutionary history?
A. The fossil record gives us examples of the
intermediate stages of evolution
B. There is no advantage that the fossil
record provides that DNA analysis doesn't
also provide.
C. The fossil record gives us the information
necessary to define species.
D. The fossil record gives us the information
needed to confirm that the Neanderthals were
the first bipedal humans.
A
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Which of the following substances is secreted by an endocrine gland?
a. Tears b. Breast milk c. Wax d. Saliva e. Hormones
Sketch and label a cross-section through the human skin. Describe two differences that would occur if the skin were
exposed to UV radiation. What will be an ideal response?
Plants and algae most recently shared a common ancestor 480 million years ago, and plants colonized land shortly after that. Light, water, minerals, and dissolved gases surround the whole body of a submerged green alga, and buoyancy of water provides physical support. What part did plants evolve to absorb gases without drying out on dry land?
A. pollen B. stomata C. vascular tissues D. cuticle E. lignin
If the first primitive cells on Earth were heterotrophs, they must have
A. received organic molecules from autotrophs. B. had DNA as their genetic material. C. manufactured their own organic matter. D. None of these answers is correct.