Where does all energy in most food webs come from?

Most energy in food chains come from the sun. Plants absorb energy from the sun through photosynthesis. Animals who eat those plants are getting energy from that, and animals who eat those animals are getting energy from the sun as well.

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.