S3 HW 1

Homework 1 - Plant and Animal Cells 1. The diagram below shows a single-celled organism that lives in ponds. C (a) Cop...

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Homework 1 - Plant and Animal Cells 1. The diagram below shows a single-celled organism that lives in ponds.

C

(a) Copy and complete the table below.

Letter

Structure

Function

A B

(2)

Controls all cell activities Cell membrane

C (b) State one difference in structure between this cell and a plant cell.

(1)

2. Select letters from below to show those structures which are found in both animal and plant cells. (1) A cell wall

B

cell membrane

C

nucleus

D cytoplasm

E

chloroplast

F

Vacuole

3. Copy the paragraph below and fill in the missing words.

(2)

Cells are the building blocks of life and the smallest u___________. Groups of cells form a ___________. When several tissues work together they form an ___________. Many ___________ working together create an organism. 4.

(a) What feature do sperms cells have?

(1)

(b) What is the function of the sperm cell?

(1)

5. Name 2 stains that can be using to view plant cells and animal cells.

(2)

6. Study the table below which refers to blood cells. Use the information provided to answer the following questions.

a) Which are the largest cells?

(1)

b) Which cells are present in the greatest numbers?

(1)

c) Apart from the bone marrow, where are blood cells made?

(1)

d) How do blood cells fight infection?

(1)

e) Which cells need iron in their manufacture?

(1)

f) Which substance is essential for blood clots?

(1)

[End of Homework 1]