Which is an example of an abiotic limiting factor?

a. the number of predators in an ecosystem

b. the amount of nutrients in the soil in an area

c. the amount of green leaves and grasses available

d. the number of species that have the same food sources

Which changes occur in the composition of the earth's layers from the core to the surface? A. The material is hotter and denser. B. The material is cooler and denser. C. The material is hotter and less dense. D. The material is cooler and less dense.

What is a climax community A. Two species that have the same niche B. a group of invasive species C. a community with very little biodiversity D. a stable community formed by succession

Which two ions are most affected by aldosterone? a. sodium and potassium b. chloride and bicarbonate c. calcium and phosphate d. sodium and phosphate

How does HIV go undetected for years in the cell of its host?

The ATP molecule shown is the universal energy source for cellular activities. Which of these processes is used to break down glucose into ATP that is usable by the cell? A) chemosynthesis B) photosynthesis C) respiration D) transpiration

How the combination of electrons, protons and neutrons results in a neutral charge of an atom?

2) Tay Sach's disease is a fatal genetic condition, in which affected individuals cannot metabolize fats properly. Children who inherit the disease rarely live past the age of five.

Which climate factor involves a decrease in temperature due to lower air pressure? A. latitude B. elevation C. topography

How are immune cells able to detect foreign pathogens?

Dog excrement is carried by rain into bodies of water, where it causes algae to grow rapidly and crowd out other organisms in the ecosystem. What is this process called?