The first trophic level of the food web shows a , a plant that produces food.

top predator

primary consumers

primary producer

secondary consumer

please help !

Suppose you are estimating the size of a blue crab population. what is the population size if the number marked in the first catch is 40, the total number in the second catch is 200, and the number marked in the second catch is 50?

What is the statement plant growth is affected by the color light

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes