What holds the two strands of DNA molecules to each other

Write down five questions you would ask a doctor about the brain

Which of the following mutations is likely to have the greatest effect on the resulting polypeptide? A. deletion of a single nucleotide B. base substitution mutation C. silent mutation D. neutral mutation

He statement "matter can be neither created nor destroyed by chemical means, but it can be changed from one form to another" is the chemical law of (A) conservation of matter. B. atomic disintegration. C. conservation of energy. D.

Can you identify this organelle that is responsible for making lipids for the cell membrane and detoxifying drugs from the cell? * A. Rough Endoplasmic Reticulum B. Smooth Endoplasmic Reticulum C. Nucleus D. Golgi Apparatus

Rust on rocks is it a Mechanical or chemical

If the same parents have four boys, what is the probability their fifth child will be a girl?

Natural selection is often called survival of the fittest. However, often times breeding or artificial selection will create offspring create population different from the population of their ancestors.

Explain how micro evolution and migration can effect an ecosystem

What do all viruses have in common?

Sheath of schwann cell containing cytoplasm is called