Which term best describes a fatty acid?
A.) hydrophilic
B.) amphipathic
C.) hydrodynamic
D.) hydrophobic
Ans: B.) amphipathic
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A paraphyletic group contains
A. a common ancestor but not all of its descendants. B. groups of species with different common ancestors. C. a common ancestor and all of its descendants. D. a common ancestor and all of its descendants but not the most recent common ancestor. E. every species ever derived from a common ancestor.
Which of the following is incorrectly paired?
A) intrauterine insemination; donated sperm is placed in the woman's reproductive tract B) in vitro fertilization; fertilization occurs in a laboratory dish C) ICSI; DNA from an immobile sperm is injected into an oocyte D) GIFT; fertilization occurs in a laboratory dish
Maternal effect genes form gradients in the developing egg of chemicals called:a
maternal Hox proteins. b. segmens. c. differens. d. morphogens. e. maternal growth factors.
Animals are classified according to all of the following features EXCEPT
A. type of body symmetry. B. mode of reproduction. C. presence or absence of segmentation. D. molecular data. E. number of germ layers.