Monday, October 13, 2008

Life Science Lesson 4 Exam

1. List thre three main parts of a cell and describe their functions.

Nucleous. The Nucleous controlls all parts of the cell, as well as cell division.

Cytoplasm. The Cytoplasm is the mixture of Ribosomes and goop. All the cell components are housed here.

Cell Membrane. The Cell Membrane keeps the cytoplasm from sloshing out as well as the components.

2. What is the function of the cell wall of the plant?
It keeps the cell rigid so the entire organism dosen't bend over.

3. In a plant cell, what specialized organelle captures the energy from the sun?
Chloroplasts.

4. Why do animal cells lack cell walls?
So that things can move in and out of cells. That's why a flake of skin doesn't cast a shadow.

5. Name three examples of tissues and organs in a human being.
Nerve tissue, skin/cartilage tissue, and heart tissue. Gallbladder, skin, and liver.

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