What observation led researchers to propose that chloroplasts evolved from cyanobacteria? A) Both produce proteins. B) Both contain mitochondria. C) Both provide structure to cells. D) Both perform photosynthesis.

What are the regions in the environment that provide basic needs

10. Secondary succession occurs in an area where the community has been destroyed and the soil has been A compressed B destroyed C preserved Dremoved

Which of the following is a renewable resource used for human needs? A) rocks B) fossil fuels C) water D) minerals

Diseases caused by pathogens are also generally known as?

The majority of Earth's atmosphere is nitrogen, N2. The percentage of nitrogen in Earth's atmosphere remains constant as prescribed by the law of conservation of matter and because it is a reasonably non-reactive gas.

Which plant division has seeds with a 3n endosperm due to double fertilization?

What is a difference between systemic and pulmonary circulation? A. Systemic circulation carries deoxygenated blood to the lungs and pulmonary circulation carries oxygenated blood to the body. B.

Name the cells that are produced by the testes and ovaries

What description best explains why viruses can become more pathogenic to hosts that were not affected by the virus before?

The chief force pushing water and solutes out of the blood across the filtration membrane is A) the ionic electrochemical gradient B) protein-regulated diffusion C) glomerular hydrostatic pressure D) the size of the pores in the basement membrane of