In what way are monotremes similar to more ancestral chordate lineages, as opposed to more recently evolved mammals?
A) Monotremes lay eggs; other mammals bear live young.
B) Monotremes perform little parental care; other mammals use lactation to feed offspring.
C) Monotremes do not have jaws; other mammals do.
D) Monotremes are ectothermic; other mammals are endothermic.
E) Monotremes perform external fertilization; other mammals perform internal fertilization.
Answer: A
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Carnivorous plants evolved because which of the following nutrients is often extremely limited in their habitats?
A. carbon B. CO2 C. O2 D. nitrogen E. iron
The bran of the seed contains primarily
a. lipopolysaccharides. b. proteins and vitamins. c. fiber and minerals. d. fructose. e. none of these.
Turkey is often served at Thanksgiving meals in which family members vie for portions of white or dark meat. Why is the breast meat of a turkey whiter in appearance than the darker meat found in the leg muscles?
What will be an ideal response?
Embryonic stem cells have the potential for becoming an invaluable resource in:
A) none of the choices is correct B) hormone replacement therapy C) cell replacement therapy D) gene therapy