Why does a cell make a copy of its DNA before it divides?

What are renewable sources of energy better than nonrenewable sources? A. because we will not run out of them B. Because they are fossil fuels C. Because they are more expensive D. Because they release greenhouse gas

Increasing the salt concentration in a solution ...

What is the fastest time of growth in a person's life?

How is a egg cell adapted

The heart has four valves that control the flow of blood. two of the valves (the av valves) normally prevent blood from flowing upwards. the other two valves (semilunar valves) normally prevent blood from flowing downwards.

Factors like lack of variation and environmental changes can cause a species to fail to survive. This is known as A. conservation. B. evolution. C. extinction. D. mutation.

What are the specialized parts of the phospholipid bilayer, and how do their structures relate to the structure of the plasma membrane?

2. Which statement about cellular respiration is correct? A The process of cellular respiration breaks sugar into simple oxygen and water B The reactants of cellular respiration are glucose and oxygen molecules C The major product of cellular

In which stage of meiosis does the separation of homologous chromosomes occur?

Where was lower egypt located