Pcr is used to amplify a segment of dna and the enzyme responsible for the replication of dna is

The following diagram shows a stage of a cell during mitosis. Two identical circles are joined in the middle and they have the nucleolus inside the nucleus in the center of the circles.

Interneurons A) are found only in the central nervous system. B) carry only sensory impulses. C) carry only motor impulses. D) only connect motor neurons to other motor neurons. E) are found between neurons and their effectors.

A is a horizontal stem at or just beneath the surface of the ground which can give rise to roots or stems.

According to Newton's first law of motion, what must happen to an object at rest in order to make it move?

Under what kingdom would an organism with the following characteristics be classified? is multicellular has cells without cell walls is heterotrophic a) Animalia b) Archaebacteria c) Protista d) Plantae

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