Cytosine is a

A) Purine

B) Pyrimidine

C) Sugar

D) Protein

Darwin noticed differences in the break shapes of finches On the various islands of the Galapagos and surmised that they all might have evolved from a common ancestor on the mainland.

What is the definition of fossils?

Is the earth getting larger and wider when plates drift away from each other? explain

Which of these statements is not an accurate description of females as identified by the 2000 census?

Jesse has recently started using methamphetamines. Which of the following is he risking by taking this drug? Stroke, Blood pressure, Common Cold, or Constipation?

Milo is observing the things around his family's farm. He writes down four different resources and whether he thinks they are renewable or nonrenewable. The table below shows his notes.

A baby born from a caesarian section (an operation where the baby is removed surgically from the abdomen instead of a vaginal birth) would result in:

What are body waves?

Which of these is NOT considered to be an organic substance? A) carbohydrates Eliminate B) lipids C) metals D) proteins

Which one of the following remains intact after extensive decomposition and can be used to assist in personal identification of remains? A. Blood B. Hair C. Bones D. Muscle structure