Page 18 - ACE YR IGCSE A TOP APPROACH TO BIO

(b) State the level of organisation for a group of ciliated cells as shown on Fig. 4.1.

[1]

(c) Goblet cells secrete mucus to trap microbes that enter the respiratory tract.
State the roles of ciliated cells (cilia) in the trachea.

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[2]
[Total: 7]

5 Fig. 5.1 represents a sperm cell and an egg cell.

A B

Protein coat
D

C

Sperm cell Egg cell
Fig. 5.1

(a) Complete Table 5.1 to state the name for the components A, B, C and D of a sperm cell.

Table 5.1
cell component A B C D
name
[4]

(b) Component C plays an essential role for the survival of the cell.
State the role of this component.

[2]

(c) Human egg cells have a protective protein coat. Using the features shown in Fig. 5.1,
describe how a sperm cell fuses with the egg cell during fertilisation.

[2]

(d) Sperm cells have flagellum that aids in swimming while egg cell is unable to move by itself.
State a way on how the egg cell is transported in the human body.

[1]
[Total: 9]

Cambridge IGCSE
TM
16 Ace Your Biology

Chapter 2.indd 16 30/03/2022 3:08 PM