Why do you think heart disease is so prevalent in the United States? How could heart disease affect other organ systems?

Which of these is a dividing zone that protects the roots as they grow into the soil?

How do hormones assist in the maintenance of healthy bone and the release of calcium to be used in other body processes?

The figure shows an energy pyramid fir an ecosystem. What happens to the amount of energy in the pyramid as it moves up through the different levels?

This type of plastid contains orange pigment. leucoplasts chloroplasts chromoplasts chlorophyll

Where does the calvin cycle occur? there is a scheme of chloroplast structure. the outer layer of the chloroplast is labeled a. the inner layer of the membrane of the chloroplast is labeled b. a column of little green cisterns is labeled c.

What is the layer of the atmosphere 20 km above Earth's surface

An experiment was conducted to determine which type of fruit attracts the most fruit flies. Equal sized pieces of apple, pear, and banana were placed in separate containers at different areas around the school.

In the F2 generation of Mendel's crosses, A. all plants had the dominant trait. B. half of the plants had the dominant alleleC. all plants had both the dominant and recessive alleles. D. one in four plants had two alleles for the recessive trait.

In a population, when the birthrate becomes higher than the death rate, the population's growth rate A) decreases. B) increases. C) slows to a stop. Eliminate D) levels off and remains constant.

Types of calcareous marine microorganisms