which enzyme is responsible for "unzipping" the DNA by breaking the hydrogen bonds between the nucleotides?

Which of the following events occurred during the first trimester? A. Heart beat begins B. Lungs fully develop C. Bones become solid D. Fetus moves and kicks and swallows

Phosphorus is found only in the earth's crust. where is the lithosphere

Which structure reabsorbs 25 percent of the water in the nephron?

A glucose molecule is the A. smallest type of protein. B. monomer of starch and cellulose C. largest of the carbohydrate polymers D. fundamental unit of genetic material

How is osmotic pressure to plant cells?

Animals are motile because they have: a. energy b. metabolism c. nerve and muscle fibers d. legs or wings

Radiation generated by the big bang cooled and is now detectable as microwaves. t/f

What's an easy way to remember the definition of biome?

What causes lighting

Urinary system keeps the pH of the blood around