Phosphorus is difficult for plants and animals to access in nature because A) it’s is typical bounds as phosphate.

B) it reacts quickly with other elements, like nitrogen

C) most phosphorus in the environment is stored in reservoirs

D) most phosphorus in the environment is bound to carbon, nitrogen and hydrogen

Wich organism obtains its energy from dead or decaying matter

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.

How many autosomes are in this human karyotype? how many sex chromosomes?