Choose all the answers that apply. Matter in an ecosystem: must be continuously replenished is part of a closed system is recycled and reused is returned to the earth by decomposers is always decreasing

Which of the following is a substance or mixture that can dissolve in water? A. carbon dioxide B. vinegar C. sugar D. all of these

During a visit to a hospital, a child receives the oral polio vaccine. He then returns to his distant village. Sometime later a polio outbreak occurs in the village, but the child and his siblings, who had not had the vaccine, are spared.

What does it mean to be unicellular

The electrons that chlorophyll loses to electron transport chain are replenished by

A city has set a goal of zero waste. The city wants to focus on recovering resources that are traditionally considered garbage. Which of the following would be consistent with the city's zero-waste goal? A. Providing free kitchen compost bins B.

State whether each of the following statements is true or false. 1. Biochemistry is the study of the vital force that distinguishes organic compounds from inorganic compounds.

What kind of bond exists between two amino acids in a protein? select one: a. amino b. peptide c. sulfhydroxyl d. ionic e. hydrogen next?

Which species concept defines a species as a group of organisms that are able to reproduce successfully and have fertile offspring?

When Darwin wrote on the origin of species he assumed due to the fossil record that species would not evolve quickly since that time evolutionary theorists have documented example of much more rapid evolutionary change now how would we explain the

Some gaming marketers focus on what segment of the population? none of these retirees baby boomers people in their 20s