Many animals have internal or external structures that provide support. Which structure found in plant cells play a similar role? A. cell wall B. chloroplast C. cytoplasm D. cell membrane

How is the current trend of climate change different from previous cycles? A. The temperatures are much higher. B. The temperatures are changing more slowly. C. The temperatures are dropping more quickly. D. The temperatures are not changing as much.

Which of the following explains why sunlight is important to aquatic ecosystems A (Sunlight provides a source of heat energy to increase water temperatures. B (Sunlight keeps harmful bacteria from taking over aquatic ecosystems.

To be acurate a theory must continue to explain

Insulin is a hormone that keeps blood glucose levels from getting too low or too high. After digestion, insulin is released from the pancreas into your bloodstream.

Which rock has the highest metamorphic grade? A. Rock formed at 500c and 8 kilobars of pressure. B. Rock formed at 1,200c and 20 kilobars of pressure. C. Rock formed at 400c and 12 kil pressure. D. Rock formed at 700c and 10 kil of pressure.

A Caucasian patient with pale skin is treated for low blood pressure with medication that elevates the blood pressure; however, the skin's pallor does not change. Which of the following is the most likely cause of the pallor in this patient?

The piece of land where a river meets a sea is called a delta. Sediments, which are carried along with the river, are continuously deposited at the mouth of the river. Which of the following natural resources is most likely plentiful at deltas? A.

Which energy conversion takes place when a solar cell is used to light a street lamp? A) solar energy → light energy B) solar energy → electric energy → light and heat energy C) solar energy → light and heat energy D) heat energy → light energy E)

Relationship between organisms that share the same habitat and niche.

List 3 characterustics of the class sea turtles belong to