How many trophic levels are there in the following food web? spider
robin
fly
worm
grass
A. 5
B. 3
C. 4
D. 2

Imagine ? person stepping on a pin and pulling his or her foot way look at the réfléchir arc of the scenarios below

This group of organisms perform the process of ammonifcation. a. herbivores b. decomposers c. carnivores c. plants

The graph shows the amount of global warming happening in different ecosystems. which populations of organisms will likely decline the most as a result of climate change, and why? a.coral reefs because of the loss of the symbiotic algae living within their bodies b.penguin populations because the fish they eat will move into warmer waters c.mountain-dwelling birds because rising sea levels will relocate their food sources d.large cats in the rainforest because of decreased habitat loss for their prey