Which statement is true of the adaptive, but not the innate, immune system? Choose 1
A. Many cells work together to coordinate the response.
B. It involves the use of lymphocytes.
C. It fights both viruses and bacteria.
D. The receptors are highly specific.

(drag each tile to the correct identify which questions can be answered by what can be answered by science or which cannot. -is it right or wrong to use genetic engineering to produce new food products? -what are the most common social settings that tend to produce accomplished artists? -if a new gene is added to the genome of a tomato species, will that species be more resistant to insects? -should humans use biotechnology to bring extinct organisms from the fossil record back to life? -do the types of organisms found in the fossil record appear in consistent sequences in different parts of the world? -are michelangelo's paintings more impressive than rembrandt's?

Common symptoms of an iron-defiency anemia include muscle weakness shortness of breath and lightheadedness why does iron deficiency causes these symptoms

Which structure in the cardiovascular system connect arteries to veins?