1. in an ecosystem, there are many factors that affect how many organisms can survive there. which of the following is one of those factors?
a. availability of water
b. number of times humans have seen the area
c. color of flowering plants
d. age of mammal species
this is study island.

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

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.

Facilitated diffusion move large molecules and/or polar molecules across the cell membrane. what does facilitated diffusion use to do this?