The structural features of the small intestine that enable the absorption of nutrients are the
A. capillary beds.
B. rugae.
C. appendix.
D. microvilli.
Answer: D
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Mutations in which of the following genes lead to transformations in the identity of entire body parts?
A) morphogens B) segmentation genes C) egg-polarity genes D) homeotic genes E) inducers
Where are oocytes produced?
A. uterus B. cervix C. vagina D. ovary E. fallopian tube or oviduct
Plants require a lot of water for transpiration, metabolism, and photosynthesis. How is water used in photosynthesis?
A. as a substrate for ATP synthase B. to combine with NADP+ to form NADPH C. to combine with ADP forming ATP D. as an electron donor E. as an electron acceptor
In order to disperse water throughout themselves more effectively, plants evolved
A. pores. B. high pressure in their roots. C. circulatory systems. D. vascular systems.