A niche of a living organism is
A. that place or localized region where it is usually found.
B. approximately the same narrow range for any organism.
C. usually capable of being continuously occupied by several species.
D. made up of many needs of the organism and interactions with its environment.
D. made up of many needs of the organism and interactions with its environment.
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What is the primary function of the transverse tubules?
A. They conduct action potentials from the surface of the muscle fiber to internal regions near myofibrils. B. They act as a channel for Ca2+ ions during excitation-contraction coupling. C. They form cross-bridges between actin and myosin during muscle contraction. D. They attach troponin to tropomyosin. E. They attach muscle fibers to skeletal elements to exert force.
What is sequenced in exome sequencing?
A) The entire genome B) The parts of the genome that encode proteins C) The parts of the DNA that are mutated D) The parts of the genome that do not encode proteins
Aequorin, a protein produced by jellyfish and ctenophores, can be used to detect the release of Ca2+ ,
an important control element in many eukaryotic cells, into the cytosol by
a. releasing a burst of light. b. depolarizing the cell membrane. c. causing a conformational change in the shape of G proteins. d. phosphorylating tyrosine. e. More than one answer is correct.
An interaction between two species in which
both species benefit is a. mutualism. b. parasitism. c. commensalism. d. competition. e. predation.