How do cities affect natural food chain found that particular area? Cities blocks the sun that producers need to survive.
Animals can change their food source.
Humans can cause some animals to become extinct, changing the food chain.
Cities can provide unlimited amount of water for animals in found in the food chain.

answer: - b cells

explanation: -

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

that scientist would be robert hooke

label a cell membrane

label b cytoplasm

label c ribosomes

label d dna

the membrane forms the outside of the cell

cytoplasm is the liquid within

ribosomes are the components within that distribute rna

the dna is the genetic make-up