Find an example of marine trophic levels, trophic pyramids and show the energy flow in the ecosystem, this can be a picture you find on the web. i need all of that in a picture

Which level of consumer had access to the smallest apply of energy

Amines amides and amino acids are categories of

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.