In which reaction would the activation energy result in an endothermic reaction?.

1. water freezing

2. an egg cooking

3. a candle burning

4. iron rusting

The overall success of an ecosystem is best judged by the A) health of its producers Eliminate B) availability of resources. C) numbers in each tropic level. D) interaction of biotic and abiotic factors.

A beaver is an organism composed of many different types of cells

What are the two types of fruits?

If the coyote population decreases what would happen to the grasshopper population?

Is the tiger more closely related to the whale or the snake? The tiger is more closely related to the whale. The tiger is more closely related to the snake. The tiger is related as closely to the whale as the snake.

A scientist has been working for 15 years to develop a new type of plastic material, but she has not yet been successful. Which of the following best explains why her work is still a success?

Technology can have good and bad effects. What is a bad effect of spraying pesticides on crops

Can your body make antibodies for pathogens that you have never been in contact with

What allows an organism to better survive in its envirmoment

The ozone hole is largely a consequence of the use of