In 1960’s studies of rats, scientists found that crowding increases the number of attacks among the animals significantly. but in recent experiments in which rhesus monkeys were placed in crowded conditions, it was not such attacks that increased significantly, but rather instances of "coping" behavior, such as submissive gestures, avoidance of dominant individuals, and huddling with relatives. therefore the evidence from rhesus monkeys makes it doubtful that crowding significantly increases aggressive impulses in primates.
which of the following, if true, most seriously weakens the argument?
(a) the rhesus monkeys is the species of monkey that is more prone to fighting
(b) coping behavior was adopted by the crowded monkeys to forestall acts of aggression among them
(c) all the observed forms of coping behavior can be found among rhesus monkeys living in uncrowded conditions
(d) some individual monkeys in the experiment were involved in more attacks than the others
(e) some of the rhesus monkeys in the experiment were subjected to levels of crowding that are unlikely to occur in natural circumstances.
prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s
metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.
anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.
telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.
the answer to your question is:
c. complementary base-pairing
blue stars have the highest surface temp
stellar distances are usually expressed in light-years
the measure of a star's brightness is called magnitude
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the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a 1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by 1.661×10−271.661×10−27.
the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.
for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.