4. The size of a population in an ecosystem is determined by a. Biotic factors such as the food available and the competition for that food
b. The carrying capacity of the ecosystem for that species
c. Abiotic factors such as space, water and climate
d. All of the above

What is the ecological role of food chains and food webs

Which of the follow describes a disadvantage secondary sources have compared to primary sources?

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.