In many cells, the structure that controls the cell's activities is the

a cell membrane

b organelle

c nucleoulus

d nucleus

Which statement is true for some photosynthesizing animals? A. Some carry out photosynthesis through the chloroplasts they incorporate into their cells. B. They conduct light-dependent reactions and the Calvin cycle in the mitochondria. C.

In a DNA molecule, which of the following forms a base pair with thymine? O A. Cytosine O B. Adenine O C. Guanine O D. Thymine

Match each theory of planet formation to its best description

Identify the process that is necessary for sexual reproduction. Also, explain why it is necessary and identify how this process increases genetic variation.

How can human activities affect the frequency and impact of natural disasters? << Read Less

Which property most determines water's vertical position in the ocean?

What is true about relative and radioactive dating

If the zoom knob on a dissecting scope is set to 1.2 what is the total magnification of objects viewed of objects viewed through it?

If 350 ml of a 4.0m solution is diluted to 2.0 ml what is the volume of solution produced

Successful interventions are designed to match physical activity with