Answer:
The combined length of the Missouri-Mississippi river system, from headwaters [of the Missouri river] in southern Montana, to the mouth of the Mississippi near New Orleans [Louisiana], is aproximately 6,267 km (3,895 mi), making it the world's fourth longest river system, after the Nile, the Amazon, and the Yangtze.
Explanation:
By definition, yes. Instructional goals/objectives, themselves, are a constraint.
Darwin better understood the mechanism for natural selection after he read a book by <u>Thomas Robert Malthus </u>on the rate of growth of populations.
Malthus was an English economist who was concerned with the implications of high population growth. He argued that once the human population outstrip the availability of food and resources, there would start a phase of struggle in which only those with better capabilities and means would survive.
Darwin, after returning from his voyage, read Malthus' work and connected it with his observation of nature. He thought in a similar vein that trait differences in the wildlife population means that those better adapted to the struggles of living in the wild would have a greater chance of survival and procreation.
Ultimately, these survival traits would compound, leading to the evolution of newer species. This provided the basis for Darwn’s influential theory of natural selection.
To learn more about Darwin's theory of natural selection: brainly.com/question/14546204
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The answer to this question is the letter A which is "more likely; because of sexual orientation differs in many twin pairs, other factors are also at work". Hence, to complete the sentence, we have it <span>Identical twins are somewhat more likely because of sexual orientation differs in many twins than fraternal twins to share a homosexual orientation; however, other factors are also at work.</span>
