When a certain plant is without water for an extended period of time, guard cells close openings in the leaves of the plant, conserving water. What does this illustrate?

Which female organ retains and nourishes the fertilized egg?

What is the most common element in a star such as the Sun? Select one: a. helium b. oxygen c. nitrogen d. hydrogen

Alexander came to power at age and reigned for years.

Which answer choice best describes the difference between folded mountains and fault-block mountains? A. Folded mountains form only at divergent plate boundaries, whereas fault-block mountains form only at convergent plate boundaries. B.

Blood is often collected in what capillary tubes rather than plain capillary tubes to prevent clotting of the blood

Which statement is true of all matter? A. It has mass B. It can be seen C. It exists only as a solid. D. It maintains its shape and size. My mind is blank, and I can't seem to remember ..._.

What are the benefits of geothermal and oil-and-gas forms joining forces?

Which class of immunoglobulins sensitizes cells to allergens?

Which statement about somatic mutations is true? A. They exist in all the cells of the body. B. They are acquired through exposure to mutagens. C. They are inherited via sperm and egg cells. D. They are passed on to offspring.

In year three the farmer discontinue the use of the insecticide Which statement would best predict the population in generation 4