Which of these describes a population? a. all the organisms that interact in a lake b. all the gray squirrels that live in a forest c. an area characterized by a group of plants and animals d. a nonliving factor in an organism’s environment is it b?

Are the earth's ocean floor and continents the same age geologically? why or why not?

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.

Does all the energy stored by the phytoplankton reach the top level of the pyramid