Which type of ocean movement varies depending on the current moon phase?

A.) current

B.) wave

C.) none of the above

D.) tide

Two populations of frogs live separated by the Amazon River. What experiment could be designed to test whether the two population are one species or two?

What element is found in both dna and protein

World organizations such as the United Nations began to discuss sustainable development in the 1890s 1970s 1990s 1920s

A stroke in the primary motor area has caused don to lose control over his skeletal muscles on the right side of his body. what lobe of his brain was damaged:

What is organ system? a. two or more organs that work in a coordinated way to carry out similar functions. b. process by which a cell divides its nucleus and contents. c. protein that organizes chromosomes and around which DNA wraps. d.

Which of these structures relies on the circulatory system to transport the chemical compounds that it makes to other body structures

What conclusion can you draw from the population pyramid? Death rates are low. Life expectancy is high. Birth rates are high. Birth rates are low.

Suggest an environment would not need a cuticle.

Explain the distinct differences between a bacterium and an animal cell.

Which of the following forces is responsible for keeping the planets in orbit around the Sun? A. electromagnetic force B. friction C. gravity D. magnetism