What nitrogen base is present in dna but absent in rna?

Why do u think heart disease is so prevalent in yhe United States

Tyen what is the answer?

Which of the following could possibly increase genetic variation indirectly? toxins predator-prey relationships competition new habitat disasters increased food supply

11/19 I sometimes get confused by others to be a plant. I'm heterotrophic and digest decaying material. What kingdom to I belong to?

A male giraffe has 31 chromosomes in each of its sex cells. How many would be present in its body cells?

Primary differences between archaic homo sapiens and modern homo sapiens is

What would be the consequence of of absence of tRNA in the cytoplasm?

Water which is returned to the environment after secondary treatment is known as:

Which tool is best used to predict the outcome of various genetic combinations?

What part of the brain consists of two large hemispheres?