Where does the Krebs cycle occur?

A. Mitochondria

B. Chlorophyll

C. Nucleus

D. Chloroplasts

Use a diagram to show how ions are formed when a sodium atom comes into close contact with a chlorine atom

Which statement about cellular respiration is true? O It produces oxygen. O It requires water. O It is used by every living cell. O It converts energy to food.

No longer existing or living

How does the Sun's energy power the water cycle? 1) Heat from the Sun's rays turns liquid water into vapor during the process of evaporation. 2) Solar flares melt glaciers. 3) Solar winds move clouds.

Which of the following best describes the relationship between climate and latitude? The greater the latitude, the colder the climate. A latitude of 0o has a climate of extreme temperature ranges.

Which of the following has a strong, positive inotropic effect, meaning it increases the strength of each contraction of the heart?

Acid precipitation is an agent of what kind of weathering?

When do scientists consider a hypothesis valid? A. when the hypothesis is testable B. when the hypothesis is published in a scientific journal C. when more than one person supports the hypothesis D. when experimentation shows it to be true

In cherry trees, white flowers are dominant over pink flowers. cross a homozygous dominant tree with a purebred recessive tree. what is the phenotypic ratio of the offspring? a. 4 ww b. 4 white selected: c. 4 ww d. 4 pink

What happens to Earth when it is farthest from the sun? A) It moves fastest, B) It stops rotating, C) It moves slowest. D) It stops revolving