The structure of cells has changed significantly over time. What concept explains the presence of mitochondria in cells? a. Biogenesis c. Spontaneous generation b. Endosymbiosis d. Chemosynthesis

Atmospheric carbon dioxide might produce a so called greenhouse effect by trapping heat near earth surface

Why are identical twins often called "nature's clones"?

What are the products of 6CO2+6H2O > C6H12O6+6O2

Both chloroplasts and mitochondria are like in that they both have inner membranes and their own what?

What are proteins lipids and other materials made out of

Can energy be transferred from animal to animal

The more stomata the more water loss?

Why does it take a long time to develop a new variety of tomato? A. Changes in traits happen gradually, over many generations. B. Many plants resist change. C. Tomatoes cannot acquire new traits. D. A species cannot change over time.

Select the one true statement. Vacuoles store nutrients, water, and waste in animal cells. Plant cells can have chloroplasts but do not have a cell wall.

Using water more effectively A. Protects the environment B. Causes the loss of natural pollution filters C. Increases with contamination D. All of the above