Which of these best describes Type III survivorship?
A) There is high survivorship for the very young.
B) Most individuals survive to older age intervals.
C) Survivorship is constant over the lifespan.
D) Survivorship is high for the few individuals that survive to a certain age.
D
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Some patients with defective mitochondria in their muscles are extremely limited in their ability to exercise
Muscle biopsy followed by microscopic examination of the mitochondria, reveal that they are of normal size, but their inner membranes are not as convoluted as normal mitochondria. How can this mitochondrial defect cause the described symptoms in the patients? A. It can't. There must be something wrong with something else in the muscle cells. B. A less convoluted membrane is more permeable, so ATP cannot be synthesized efficiently. C. A less convoluted membrane has less surface area, so there is not as much of the ATP-making machinery. D. The less convoluted inner membrane causes the two membranes of a mitochondrion to adhere together, decreasing the mitochondrial effectiveness. E. There is not enough information to determine the cause.
Which of the following groups of fungi are found exclusively in association with plant roots?
A. glomeromycetes B. chytrids C. zygomycetes D. basidiomycetes E. ascomycetes
To maintain lysogeny in lambda, which of the following needs to occur?
A) Binding of repressor protein to OL B) Binding of repressor protein to OR C) Inactivation of PL D) Inactivation of PR E) All of these
The primary site of nutrient reabsorption in the nephron is the
A. distal convoluted tubule. B. descending limb of the loop of Henle. C. Bowman's capsule. D. proximal convoluted tubule. E. collecting duct.