Net primary productivity varies among ecosystems and depends on many factors. These include solar energy input, temperature and moisture levels, carbon dioxide levels, nutrient availability, and community interactions
It may make birds confused as to when the food source will be there, so they stop visiting because the food source isn't there when they thought it was going to be. So I think they would stop migrating because of confusion mainly.
The answer is A. anther and ovary.
The female part of an angiosperm flower is called a pistil and it consists of a style, stigma and ovary. The male part of an angiosperm flower is called a stamen and it consists of an anther and corolla. Thus, among all choices, choice A is the answer.
Choice B - anther is the male part of the flower, but sepal is a protective part of the flower and not reproductive.
Choice D - stigma is the female part of the flower, but sepal is a protective part of the flower and not reproductive.
Choice C - "vary" is not a word, but it is a mistake and it should be "ovary," the answers could be both choice A and C.
The plant roots containing nitrogen fixing bacteria are
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- <u>C.</u><u> </u><u>PEA</u>
Plants of the Pea Family known as legumes, are some of the most important hosts for nitrogen-fixing bacteria, but a number of other plants can also harbour these helpful bacteria.
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The answer is Clams
The chart shows that the lowest pH level that the clams can survive is 6.0. Therefore, the clams would most likely die if the pH level dropped below this number.