The main way in which <span>a decrease in the number of songbirds might be expected to affect the trees in a northern forest is that the would be overrun with more instincts due to a lack or predators. </span>
The underlying assumption of the Harrod-Domar growth model is that
Growth is mainly determined by capital accumulation through savings
The Harrod-Domar model is a model of economic growth.<span> According to the
Harrod-Domar model, economic growth depends on two important factors, the
saving ratio and the capital output ratio.</span>
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Answer:
Natural selection
Explanation:
According to Darwin's theory, natural selection is the process by which individuals better adapted to their environments have more chances to survive and reproduce, and thereby their descendants will be better represented in the next generation. This mechanism exploits the existence of natural variation among members in the population which is used to select those individuals that are better adapted (i.e., with a higher adaptive fitness) for their environments. Natural selection is a key mechanism of evolution by which species change across time.
Homeostasis is the biological ability to maintain internal stability. An example is you body temperature,how much water your body keeps or expels, and keeps levels of thinks such as blood cells normal. It helps your body functions to stay constant.
When insects fly, they expend more energy and consume more oxygen as compared to their state of rest. Insects have a tubular breathing system called tracheae, instead of lungs. The action of flight muscles pumps air through the trachea. This is how they generate extra energy while flying.
