Question

SCIENCE

1. For what reasons do the cells that make up multicellular organisms need to reproduce?

2. Is a red blood cell more specialized than an amoeba, or is it the other way round?

3. What are the advantages of having specialized cells? Are there any disadvantages? Explain your answer.

4. a) Name a plant organ.

b) Identify the tissues that make up this organ.

c) Describe the cells that make up each of the tissues in these organs.


1. Identify the organisms in Figure 2.40 as unicellular or

multicellular. Give reasons for your answers in each case.

2. a) Sketch a plant cell and identify, using labels, the organelles

and other cell structures.

b) Do the same for an animal cell.

c) Describe the key differences between plant cells and animal

cells.

3. What is the function of a compound light microscope?

4. In your opinion, which structure or organelle is the most

important to the health of a cell? Give reasons for your answer.

5. Choose one of the items below. Using words, pictures, or both,

explain how you would prepare it to view with a microscope.

Also, make a sketch showing what you think it would look like

under low, medium, and high power. (Ask your teacher if you

can set up a microscope to verify, and, if necessary, modify your

sketches.)

a) a hair from your hand

b) a fleck of dandruff

c) a grain of pepper

d) a grain of salt

6. Imagine that an amoeba is placed in a solution of salty water.

The concentration of salt in the solution is greater than the salt

concentration of the amoeba’s watery cytoplasm. What will

happen, and why? Be sure to use the proper science terms to

communicate your understanding.

Answer 1

ANSWER

Human reproduction is any form of sexual reproduction resulting in human fertilization. It typically involves sexual intercourse between a man and a woman. During sexual intercourse, the interaction between the male and female reproductive systems results in fertilization of the woman's ovum by the man's sperm.