The removal of the __________ gland(s) will disrupt
normal blood clotting and muscle contraction.
a. thymus
b. thyroid
c. pituitary
d. parathyroid
e. pancreas
Answer: d
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How is the cell cycle of Sulfolobus spp. similar to that of eukaryotes?
A. Sulfolobus demonstrates prophase, metaphase, anaphase, and telophase. B. A centrosome is apparent in Sulfolobus during G2. C. The cytokinesis process in Sulfolobus is similar to the process in eukaryotes. D. Sulfolobus has microtubules composed of a tubulin homolog that separate the chromosomes.
Over long periods of time, many cave-dwelling organisms have lost their eyes. Tapeworms have lost their digestive systems. Whales have lost their hind limbs. How can natural selection account for these losses?
A) Natural selection cannot account for losses, but accounts only for new structures and functions. B) Natural selection accounts for these losses by the principle of use and disuse. C) Under particular circumstances that persisted for long periods, each of these structures presented greater costs than benefits. D) The ancestors of these organisms experienced harmful mutations that forced them to lose these structures.
What are the three sequential mechanisms involved with learning? Explain how a mouse would learn to locate cheese
in a maze as indicated by these steps.
What will be an ideal response?What is the difference between a strict anaerobe and a facultative anaerobe?
What will be an ideal response?