Amphibians, reptiles, and mammals pass through embryonic stages in which they have tails and webbed fingers and toes
Indicate whether the statement is true or false
TRUE
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Which type of glial cells is involved in the production of cerebrospinal fluid?
a. satellite glia b. astrocytes c. ependymal cells d. Schwann cells
Turbinates were found in therapsids, extinct reptiles thought to be ancestors of mammals. What could the researchers conclude from this observation?
A. Ectothermy arose before fur. B. Ectothermy arose after fur. C. Endothermy arose before fur. D. Endothermy arose after fur. E. Birds did not descend from reptiles.
Base substitutions of the (first/second/third) base of a codon frequently produce silent mutations.
Fill in the blank(s) with the appropriate word(s).
Tuberculoid leprosy
A. causes asymmetrical, shallow skin lesions with loss of pain sensation. B. is the most disfiguring. C. pathogen grows extensively in cooler body areas such as nose, ears, testes. D. complications include secondary infections, kidney or respiratory failure. E. includes all of these choices.