Ben observes that his car will not start. What is a good testable hypothesis?

1. The car will not start.

2. The car is green.

3. The car is out of gasoline.

4. The car has 4 tires.

How is the electron transport chain different in photosynthesis and cellular respiration?

How many FADH2 molecules are produced in the Krebs cycle? A - 1 B - 2 C - 3 D - 4

The four organic molecules found in organisms are carbohydrates, proteins, nucleic acids, and amino acids. True False

Natural selection leads to

Prophage occurs when

As part of a science experiment, Jose did a test for starch on a slice of apple and a slice of potato. The yellow-orange iodine solution stayed the same color when it was put on the apple, but it became black on the potato.

What's the difference between transgression and marine regression

In DNA adenine levels were equal to thymine levels and cytosine levels were equal to guanine levels.

In this field of sunflowers, variation exists. Some flowers are tall, others short, and finally some plants are an intermediate height. The tallest plants shade the shorter; the taller plants are pollinated first.

What is a major use for the water humans are withdrawing from the ground?