Direct sources of purine ring atoms in the de novo synthesis of IMP include:

1. glutamine.

2. a component of the tetrahydrofolate one-carbon pool.

3. aspartate.

4. glycine.

TLS Online TPP Program

#Question id: 13169

#Unit 10. Ecological Principles

Which of the following causes Earth's seasons?

TLS Online TPP Program

#Question id: 13170

#Unit 10. Ecological Principles

Which of the following events might you predict to occur if the tilt of Earth's axis relative to its plane of orbit was increased 33.5 degrees?

TLS Online TPP Program

#Question id: 13171

#Unit 10. Ecological Principles

Imagine some cosmic catastrophe jolts Earth so that its axis is perpendicular to the orbital plane between Earth and the sun. The most obvious effect of this change would be

TLS Online TPP Program

#Question id: 13172

#Unit 10. Ecological Principles

The main reason polar regions are cooler than the equator is because

TLS Online TPP Program

#Question id: 13173

#Unit 10. Ecological Principles

Landscape ecology is best described as the study of

TLS Online TPP Program

#Question id: 13174

#Unit 10. Ecological Principles

Studying species transplants is a way that ecologists