The photograph shows a consequence of air pollution. What does the photograph represent?

A. Pollutants break down the layer of ozone in the stratosphere.

B. Gaseous pollutants and particulate pollution mix over cities.

C. Pollutants react with water and are deposited on Earth's surface.

D. Algae overgrowth occurs in the presence of too many nutrients.

Tides that occur during the new and full moons

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?

2. which of the following statements does not accurately describe stem cells? a. embryonic stem cells make up the inner cell mass of a blastocyst. b. with more research, stem cells may be used to repair or replace damaged cells. c. the use of stem cells is without any objections since it can be used in therapies to humans. d. adult stem cells are multipotent and can differentiate into many types of cells.