Does sand/silt have any internal structures?

Which of the following is a difference between a food chain and a food web? selected: a. food webs contain both plants and animals. food chains only contain animals.this answer is incorrect. b. food webs show energy transfer. food chains show which animal eats which animal. c. food webs separate organisms by tropic level. food chains do not. d. food webs are a complex patterns of energy flow. food chains only show one line of energy flow.

(! ) what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

How do diseases caused by bacteria and diseases caused by viruses react to antibiotics?