Imagine a very simple food chain in which orcas (killer whales) eat only sea otters, sea otters eat only sea urchins, and urchins eat only kelp (marine
algae). Orcas, sea otters, and urchins are the only significant consumers in
the system. To keep one ton of orca biomass fed, you would need about
ton(s) of kelp.*
1
10
100
1,000
1,000,000

scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.

what is the statement?