State how the sperm is structurally adapted to reach and penetrate the ovum. [4 MARKS]

The trachea divides into two tubes at its lower end. What is the name of these tubes ?

Functional megaspore in an angiosperm develops into:

Expulsion of undigested waste material through anus is known as ___ .

‘Dup’ sound is produced during the closure of

Select the list of greenhouse gases mentioned in descending order of their abundance.

Fungi use __ mode of nutrition.

Explain pollination

Roquefort cheese is ripened by using a

What are the uses of antibiotics and vitamin B12?

Study the diagram given below and then answer the questions that follow : (a) Name the cells of the pancreas that produce (1) glucagon (2) insulin. (b) State the main function of (1) glucagon and (2) insulin. (c) Why is the pancreas referred to as an exo-endocrine gland ? (d) Why is insulin not given orally but is injected into the body ? (e) What is the technical term for the cells of the pancreas that produce endocrine hormones ? (f) Where in the body is the pancreas located ?

Which of the following criteria does not pertain to facilitated diffusion?

The diagram below illustrates the change that occurred in the frequency of phenotypes in an insect population over 10 generations. A probable explanation for this change would be that over time there was…….

2 areas of study namely evolution and classification are interlinked. Justify the statement.

A homozygous purple flower variety of pea plant [PP] is crossed with a white flower variety of pea[pp]. Answer the following questions by using Punnett square:- i) Mention the phenotype and genotype of the F1 and generation offsprings. ii) If the offsprings of the F1 and generation are crossed, what will be the phenotypic ratio and genotypic ratios of the F2 generation? iii) State Mendel's Law of dominance. ​​​​​​iv) What is the scientific name of the pea plant? v) Name two genetic diseases in humans