Explain why an astronaut, after 3 weeks in space, might experience fatigue and weakness for a short time upon returning to Earth. You should focus on blood pressure in your answer.

He two letters that refer to an organism's genetic makeup is the

Is there penicillin in acyclovir

Give any three difference between manure and fertilizers

What comes together at a joint? a. an arc of movement b. flexible tissue c. two bones d. skin and hair

In the classification of matter, how would we classify air? A) pure mixture B) pure substance C) homogeneous mixture D) heterogeneous mixture

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