What does elements in the first two columns of the periodic table have in common

Hot lava cooling and hardening is an example of

The base pairs in a DNA strand are held together with hydrogen bonds. If the two nitrogenous bases in each pair were held together with covalent bonds instead of hydrogen bonds, what effect would it have on the cell?

Describe what the hydrogen ion pump does?

When Hydrogen and Oxygen form a molecule, what happens to their electrons? A. They share their electrons. B. They both lose electrons. C. Nothing happens to their electrons.

What happens when an ecoystem is in equilibrium

Which of the following diseases is caused by a spirochete? tularemia relapsing fever rheumatic fever Rocky Mountain spotted fever

The brain of the nervous system and the endocrine glands of the endocrine system are similar to one another in certain ways. Both act to send messages to distant body parts. What is a significant difference of the activity of endocrine glands? A.

After reviewing the process of meiosis describe how an error during meiosis could lead to polyploidy

The requency of the red eyes (p ellele) in fruit flies is 63% what is the frequncy of the white eyes allele q allele

Explain the process of buffering that occurs in oceans.