What did scientists believe was the cause of the hole in the ozone layer?

A) cars

B) aerosol sprays

C) acid rain

D) pump spray bottles

In which direction does the Sun appear to move across the sky? A. from west to east B. from east to west C. from north to south D. from south to north

Which of the following is not a characteristic of viruses that makes them difficult for drug development? Group of answer choices They use the host's machinery for replication. They have a very simple structure. They are smaller than the host cells.

Which kind of information is known about a person if that person's DNA is in a database? how old the person is where the person was probably born some diseases the person might have whether the person is likely to commit a crime

What is Charles Darwin's major contribution to science? A. He categorized thousands of species to compare their different traits. B. He explained how species evolve. C. He showed DNA is passed from parents to offspring. D.

What is the difference between a rock and a mineral?

Why is the action of phagocytes considered a nonspecific response? A It does not occur at any specific temperature. B It is not involved with the production of any specific type of lymphocyte. C It does not respond to any specific type of hormone.

Which statement best describes the relationship between the deer and the plants?

A decrease in honey population will ...

Viruses cannot reproduce on their own and require a host organism to do it for them. This is one reason viruses are not considered to be alive

If the environment changes what is the first thing a species will do to survive