What keeps Mars in orbit around the Sun?

Select one:

a. friction

b. gravity

c. magnetism

d. solar power

Convection about the city

Explain two ways in which genetic variation is preserved in a population

Which of the following statements is true? Secondary consumers are always carnivores. As population density increases, competition for resources decreases. A sparrow and a caterpillar both live in the same tree. They share a niche.

All members of the same species that live in the same area and make up a breeding group is called

DNA is able to control cellular activities most directly by regulating the process of what?

Which of the following statements about maltose are correct? 1. it is formed from two monosaccharide molecules of the same type 2. it is soluble in water 3. it is a reducing sugar

How do cells store energy

Students planted 100 seeds in two different plots of land on the same day. Both plots of land measured 10 square meters. They recorded data for one year.

Qual a função do estômago?

Which example best describes one way that humans contribute to the water cycle? A. formation of genetic material B. evaporation of sweat from skin C. production of oxygen D. fixation of nitrogen into ammonia