How do animals get the carbon atoms to form the CO2 molecules that they exhale?

A: from oxygen they take in

B: from glucose they eat

C: from carbon dioxide they inhale

Consider the way that muscle is stimulated to move and the way that the heart is stimulated to move. Based on the positions of the electrodes, what might some challenges be to measuring ECG signals during exercise?

Name the different types of this monomer that make up dna

How can cholesterol be carried in our hydrophilic bloodstream?

How did the production of tobacco and sugar in Britain's colonies affect the prices of these products in Europe and the Americas in the eighteenth century?

What is the difference between prokaryotic cells amd eukaryotic cells?

How much heat energy is needed to raise the temperature of 340 g of a sample of hydrogen gas from 20 to 45 degrees?

Broccoli, cauliflower, kale, Brussels sprouts, and cabbage are all just different breeds of a single type of weed commonly found along the shores of the English Channel. The differences between them were all gradually selected for by various farmers.

Which type of transport requires energy to move a molecule?

What was the neolithic revolution and how did it change life

In two or more complete sentences, compare relative dating and absolute dating of earths materials.