Answer:
The nervous system is composed predominantly of neural tissue.
Explanation: Anatomist study anatomy, the study of the structure of organisms or their parts. By observing the structure of the nervous system, anatomist will tell that it is composed predominantly of neural tissue. So, he observed the structure of one part of an organism.
Answer:Wildebeest are considered keystone species because their presence has myriad effects on the ecosystem, unlike those of any other species. Wildebeest are the "lawnmowers" of the Serengeti grassland. They keep grass short which in turn reduces the frequency of fires.
Answer:
Amino acid substitutions at the interaction interface may result in binding affinity changes, and thus affect the structure of the protein complex. ... This structural change may significantly affect the binding energy, and make the protein complex unstable
Explanation:
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Answer: How scientists define and measure population size, density, and distribution in ... In ecology, a population consists of all the organisms of a particular species ... some methods ecologists use to determine these values for populations in ... In the end, the data can be used to estimate the population size and population density