Which condition is a biotic factor of an aquarium ecosystem?

A) Algae growing on the glass.

B) Gravel on the bottom of the aquarium.

C) Amount of oxygen in the water.

D) Temperature of the water.

What other questions do you have about formation of earth's surface features.

What enzyme is responsible for adding new bases during the semiconservative replication of DNA? a. RNA polymerase b. helicase C. ligase D. DNA polymerase

Extra amounts of fatty material in the blood is called

During exercise energy demand in muscles increase which other system directly provide for this demand

Why is organ transplant surgery so difficult

Ground squirrels are found in many areas of the United States. They live in underground burrows and are often attacked by birds of prey, coyotes, and boBCats. Which of the following is a limiting factor for a ground squirrel population?

10. Which of the following is an emerging dis- ease that was unknown 50 years ago? a. malaria b. dengue fever C. Lyme disease d. schistosomiasis

You eat a large meal and then hike up a hill. What kind of energy transformation is your body performing? A. Chemical energy to kinetic energy and nuclear energy B. Potential energy to sound energy and nuclear energy C.

Which nervous systems balance each other to provide homeostasis?

The modern classification system is based on A - putting organisms into categories based on where they live. B - putting organisms into categories based on how they reproduce. C - putting organisms into categories based on similar characteristics.