Front

What is identified in both animal and plant cells?

Back

The nucleus.

Front

What is the function of the nucleus in both animal and plant cells?

Back

It controls the activities of the cell.

Front

In the 1670s, Antony Leeuwenhoek discovered microorganisms in the human mouth. Later these microorganisms were determined to cause dental plaque, which is harmful to teeth. Which of these describes another way microorganisms can be harmful?

Back

Microorganisms break down meat before it is eaten.

Front

Students drew sketches of a microorganism and a muscle cell.

How are these two cells different in function?

Back

The microorganism performs all functions within a single cell, while the muscle cell performs a certain function within an organism.

Front

A teacher shows her class a drawing of a plant cell. A student states that the function of the cell membrane is to maintain the cell’s shape. The teacher states that this is incorrect. Which description provides the correct function for the cell membrane?

Back

It controls what enters and leaves the cell.

Front

Animals are classified into animals with backbones.

Back

vertebrates

Front

animals without backbones

Back

invertebrates

Front

Vertebrates have a backbone, or spine, that runs the length of their body, and they are sorted into five groups:

Back

fish, amphibian, reptile, bird, and mammal. Primates and rodents are examples of vertebrates.

Front

Animals without backbones, known as invertebrates, make up 97% of all animal species.

Back

insects, spiders, and crabs

Front

Plants

Back

organisms that produce (make) their own food