It has been thought that many diseases now associated with aging are related to malfunctioning mitochondria. Why are the mitochondria so important to all cells?
a. They produce energy in the form of ATP.
b. They carry out anaerobic respiration.
c. They are the source of all human disease.
d. They are extremely large.
e. They are located only in vital organs.
ANSWER: a
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Specialized symbiotic associations between the roots of plants and fungi are called
A. lichens. B. hyphal associations. C. heterokaryotic junctions. D. mycorrhizae. E. a mycelial unit.
During which Period was there lush vegetation, the age of the dinosaurs and the break up of Pangea?
a. Cambrian b. Mesozoic c. Paleozoic d. Jurassic e. Cretaceous
The corolla is made up of
a. sepals. b. petals. c. carpels. d. pollen grains. e. anthers
Which of the following sequences is correct?
a. receptors >>> sensory neurons >>> motor neurons >>> interneurons b. sensory neurons >>> receptors >>> motor neurons c. motor neurons >>> integrators >>> sensory neurons d. receptors >>> motor neurons >>> interneurons >>> sensory neurons e. sensory neurons >>> interneurons >>> motor neurons