7. What two developments had to occur for life to begin on Earth?

Animal a and animal b each have 95% of there DNA in common. Animal a and animal c each had 50% in common. How does this support the hypothesis that life changed over time

Which statement accurately compares the environmental impact of acquiring coal and refining crude oil? 1. Both require underground mines to be constructed. 2. Both emit more greenhouse gases than natural gas does. 3.

The structure of adenosine triphosphate (ATP) is shown here. Which statement best explains how energy stored in the chemical bonds of ATP can be released. A) Adenine is removed by hydrolysis from an ATP molecule.

Name a hormone secreted by the thyroid gland that acts to lower blood calcium

A pack of wolves kill and eat a deer. What kind of interaction takes place between the wolves and the deer?

What is the main function of cuticle in plants? 1. It prevents water loss. 2. It absorbs sunlight. 3. It protects the plant from predators.

What minerals are found in bone? What do these minerals do for your bones

Scientists developed a new margarine containing plant ingredients they think will lower blood cholesterol levels in people who use the margarine.

Which of the following is a good example of something a cell might do during G1 phase

A square kilometer of forest has 200 deer. What is the term that is used to describe this number?