Why is gel electrophoresis able to separate strands of DNA

When comparing the brains of rats raised in a rich environment requiring lots of learning and motor behavior with the brains of rats raised as "couch potatoes" (greenough, et al., 1990), the cerebellums of the more active rats?

Why are decomposers and detritivores important parts of a food web?

Some organisms obtain energy and nutrients from plants in an ecosystem. These organisms have energy stored in their bodies. What happens to the energy in the ecosystem when the organisms die?

What does a population graph with a J curve show? A. Exponential growth B. Life span C. Survivorship data D. Logistic growth

All living things depend upon a genetic code for reproduction. True or False?

A cell is halted in the G1 phase of the cell cycle. Which best explains why the cell has not moved into the S phase?

If you set up an experiment and the results do not support your hypothesis, what should you conclude? A.) You may want to alter some aspects of your experiment and try it again. B.) You should give up on this research project. C.

The cancellation of two waves occurs because of which of the following

What is it called when a bacterium uses a virus to transfer its DNA to another bacterium?

Which definition best describes global warming? A. A long-term change in the Earth's climate B. A long-term increase in the Earth's average temperature C. A long-term change in the climate of a region or a city D.