Looking at the web above, each letter represents a species of animal in an ecosystem food web. Which of the following is most likely to cause the greatest decrease in the species B population.

A decrease in species C

A decrease in species E

A decrease in species D

A decrease in species A

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

Anitrogen atom and an oxygen atom combine chemically to form nitric oxide. what is nitric oxide?

Which of the following is not a characteristic of a hydrogen bond? 1. it is responsible for the unusual physical properties of water. 2. it is weaker than a covalent bond. 3. it is stronger than other dipole-dipole interactions. 4. it can occur when hydrogen is covalently bound to very electronegative elements liks f, cl, br and i.