Anaerobic photoautotrophs were the first organisms to release oxygen into the early atmosphere.

a. True

b. False

Describe the precautions to be taken when fluoroscopy or an x-ray is taken during surgery.

Which of the following pairs of terms could be used to describe a bullfrog that is active at night and enters a state of complete inactivity during the cold months

Infer: How might the size of a group affect its defense?

Wastewater treatment plants can make wastewater drinkable again. Which of the following is a technology used to remove disease causing organisms from wastewater? O A. Allowing solid wastes to settle out of the water O B.

When food molecules combines with oxygen what is released?

Choose the best description of an allele

Which has three subtypes known as patrilineal, matrilineal, and ambilineal?

Methods of include seeing for which a scientist could use a tool such as a microscope

An environmental group is opposing a proposed dam on a river. Damming the river would create a reservoir of water that could be used to supply drinking water to the surrounding community.

What ultimately controls the cell's production of proteins? A. DNA B. RNA C. protein D. allele