What is a major drawback of using fossil fuels?

A. They warm the planet

B. They are flammable

C. they release oxygen when burned

D. They contain no greenhouse gases

Choose all the answers that apply. The cardiovascular system transports material for the respiratory system digestive system endocrine system excretory system nervous system

A carrier is a person who has

Which of the following is a density-independent limiting factor? A. Earthquake B. Disease C. Parasitism D. Emigration

Here is an idea that will recur throughout your study of the function of molecules: change the structure, change the function.

Which of the following is a form of active transport? a) carrier protein b) receptor protein c) sodium-potassium pump

Which letter represents an organism that could only be a primary consumer?

Muscle cells in athletes often have more mitochondria than muscles cells in non athletes based on the observation it can be inferred that the muscle cell in athletes

1. What can all rocks be broken down into? 2 What kind of rock does magma cool and harden into another?

Why might it be beneficial for governments to restrict the types of plants and animals that individuals can keep as pets in a particular environment?

1. Which of the following gene is responsible for an amino acid synthesis in YAC vector? CEN URA3 ARS TRP1