When a comet nears the sun, what happens to the nucleus?

1. It becomes solid.

2. It becomes visible.

3. It becomes gas.

4. It disappears.

Pineapple monocot or dicot

A biologist has been studying two populations of trout in Montana for the last 25 years, when the two populations were established from one common population. In the southern population, the fish now have a slightly different mouth shape.

The naming system of Carlos Linneaus is called

What pair of statements about Blehert's and Behr's work represent an observation that was first made directly in the field and then a repeat, reinforcing observation made in the lab? Choose one or more: A. A microbiologist with the U. S.

The peppered moth provides a well-known example of natural selection. The light-colored form of the moth was predominant in England before the Industrial Revolution. In the mid-19th century, a dark-colored form appeared.

The shape and size of a birds beak would mostly be affected by what environmental limiting factor

Why do you think scientists use the word mutate to describe the genetic process shown in the video

Which best describes the purpose of a controlled experiment? A. to make sure the results of the experiment support the hypothesis B. to prevent a dangerous condition resulting from a reaction C.

Bones, joints, ligaments, and cartilage are parts of the a) refrigerator b) muscles c) skeleton

Chloroplasts cannot move on their own. How do they move around the cell?