What happens to a cell in the S phase?

A. The nuclear envelope develops around each set of chromosomes.

B. DNA replicates to form two copies of chromosomes.

C. Sister chromatids separate out from the chromosomes.

A neon light is placed in one evacuated (airless) chamber. A battery powered radio is placed in a second evacuated chamber. Both devices are switched on at the same time by remote control. What observation could be made?

Identify which scientist or group of scientists was responsible for making each of the following discoveries. The double-helix structure of DNA: The chemical composition of proteins: The monomer of nucleic acids:

A new element has been discovered. Newelementium has 40 more protons than radon. It also has the same number of protons and neutrons. What would newelementium's atomic number and atomic mass be? (Use the periodic table)

Why it is unlikely for children to have an identical combination of traits to their parents.?

A molecule is involved in a chemical reaction causing the arrangement of it atoms to change. What is the result of this process?

Greg checks his watch one day at noon when the Sun is directly overhead. He decides to check his watch when the Sun is directly overhead again tomorrow.

What is the primary function of the juxtaglomerular complex?

Which is an example of how stem cells are currently being used

Describe the type of evidence that scientists used for classifying organisms before they were able to sequence dna

Which of the following is true for DNA but not RNA? Release of PPi from the monomer provides the energy for polymerization. It has 4 different bases. It has secondary structure. None of the above; all are true for both DNA and RNA