CSEC Biology Paper 2 May/June 2005 - Free CXC Past Paper with Answers

Figure 3 below shows the location of selected glands in the female human body.

Figure 3. Selected glands of the female human body

Figure 3 below shows the location of selected glands in the female human body.

Label Figure 3 to show the position of THREE glands that produce hormones involved in growth and development in humans.

Complete the table below to identify and give the role of the hormones of growth and development produced by the glands you located in (a) (i).

The glands involved in growth and development are all examples of endocrine glands.

Give ONE example of the type of gland you identified in (b) (i) a) above.

Give ONE similarity and ONE difference between endocrine glands and the type of gland identified in (b) (i).

Similarity:

Difference:

If the gene for insulin production is transferred from a human pancreatic cell to a certain bacterium, it produces human insulin within the bacterium.

Give the name of the process of transfer of the gene.

State ONE advantage of the process you mentioned in (c) (i) above.

Figure 4 below shows the basic plan of two flowers, Flowers 1 and 2.

Figure 4. Two types of flowers

Name the parts of Flowers 1 and 2, labelled I to V, in Figure 4 above.

I II III IV V

The flower structures labelled in Figure 4 are sometimes referred to as 'essential' structures.

Suggest ONE reason for the use of the term 'essential' to describe the labelled structures.

Identify the pollinating agent for EACH flower in Figure 4.

Flower 1: Flower 2:

Identify the pollinating agent for EACH flower in Figure 4.

Flower 1:

Flower 2:

Identify TWO characteristics of EACH flower that are useful in pollination.

Characteristics in Flower 1:

Characteristics in Flower 2:

In the space provided below, draw in outline TWO simple diagrams to represent the shape of the fruit EACH flower is likely to produce.

Fruit of Flower 1

Fruit of Flower 2

Describe the changes taking place at stages II and IV.

Stage II: Stage IV:

Identify TWO mineral salts found in garden soil and explain the role of EACH salt.

Mineral salt 1: Role: Mineral salt 2: Role:

During their life cycle plants may store large amounts of excess food.

Explain TWO advantages to the plant of storing food in its seeds.

Describe TWO situations in the life cycle of a plant when stored food is used.

Using the chart in Figure 6 above, state the genotypes of family members, 1, 2 and 6.

Family member 1: Family member 2: Family member 6:

Using the chart in Figure 6 above, state the genotypes of family members, 1, 2 and 6.

Family member 1: Family member 2: Family member 6:

Identify the type of variation involved in the inheritance of earlobe size in humans shown in Figure 6 above.

Give ONE reason for the importance of variation among living things.

There are various blood group systems, but the one most commonly used is the ABO system.

Account for the fact that in the ABO system, although there are FOUR different blood groups in existence, only THREE alleles determine these blood groups.

Name ONE inherited disease.

How do the treatment and control of an inherited disease differ from the treatment and control of a deficiency disease?

Treatment: Control: