Air pollution is caused by A. natural events and human activities. B. human activities but not natural events. C. heavy rainfall. D. the sun.

The mature cells of bone are called:

What is a possible diameter for a typical neutron star? A 2km B 20km C 200km D 2000km

With which idea is a person who believes in free will is likely to agree? Everyone is created equal. American artists should follow the styles of European artists. Women should have the right to vote.

O que é camuflagem? Me dê exemplos.

Which seedless plants has been used to treat burns

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