This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web.
a. bacteria and fungi, the decomposers, recycle carbon from dead organisms.
b. carbon is found in the grass and is passed from one level to the next in this food web.
c. all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere.
d. plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.

Where can you find prokaryotic and eukaryotic cells?

In a cross between individuals of a species of tropical fish, all of the male offspring have long tail fins, and none of the females possess the trait. mating two of the f1 fish fails to produce females with the trait. explain the inheritance pattern of the trait.

Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?