What is the name for a fossil that is common to a particular period of geologic time and serves as an indicator for that time?

A. coprolite

B. microfossil

C. index fossil

D. stromatolite

Classify the substances as acidic, basic, or neutral: Vinegar, baking soda, tomato juice, sugar

Which choice represents a dihybrid cross?

A gene mutation is when chemical changes occur in DNA of individual cells. True or False

Which statement about organism classified in the same genus is true?

Vascular plants, like this one, take in water through the roots. How does the water get to the leaves, where photosynthesis happens?

Maria is testing the behavior of monkeys. First, she shows the monkey a rectangle. Then she shows the monkey a rectangle and a cylinder. If the monkey pushes aside the rectangle, Maria gives the monkey a food reward.

Why is the phloem in a leaf important to the roots of a plant? A. It provides the roots with carbohydrates. B. It provides the roots with nutrients from the soil. C. It transports water to the leaves from the roots. D.

A mutation causing an addition or a deletion of one base pair resulted in the production of a nonfunctional mutant protein. The sequences of the normal and mutant proteins are given below.

What job does each organelle do in a cell?

Which of the following statements is true of an object composed of a single cell? It could be considered living only if it has some of the other characteristics of life. It is a living thing. It is not a living thing. It could become a living thing.