(a)(i) Specimen A is a flower. Remove all the stamens and three petals from specimen A leaving the special petal.
Make a drawing 10-12cm long of the remaining parts of specimen A and label fully.
(ii) what type of ovary is present in specimen A?
(ii) Give one reason for your answer in 1(a) (i) above.
(iv) Describe the petals and sepals of specimen A.
(v) What is the function of the special petal?
(vi) State three features of specimen A which have led to the success of flowering plants.
(b)(i) What type of fruit is specimen B?
(ii) Give two other examples of the fruit type.
(iil) State the mode of dispersal of specimen B.
(iv) State two biological importance of the class of fruit to which specimen B belongs.
Explanation
(ii) Type of ovary: Superior Ovary.
(iii) Ovary is located at a higher position than receptacle/on top of receptacle/above point of attachment of other fioral parts.
(iv) Description of petals and sepal: Sepals are of the same colour as petals/petaloid.
Sepals are smaller than petals in size.
Petals are fan shaped; brightly coloured.
Standard petals is tubular/flat with marks.
- One sepal is keel shaped.
(v) Function of special petal: It guides insect/bee to the nectar.
(vi)- Brightly coloured petal attracts insects which pollinate flower
- Large petals which are easily seen.
- Presence of nectar, attract insect which enhance cross pollination leading to variety and survival of the species.
- Sticky stigma to hold pollen grains for pollination.
- Sticky/rough pollen grains to ensure pollination/attachment to insects.
(b)(i) Type of fruit (Specimen B) Legume/Pod
(ii) Examples of legumes: Bean, peas, caesalpinia, crotalaria, Delonix sp., MuCuna.
(iii) Mode of dispersal: Explosive mechanism
(iv) Biological importance of legumes: - Source of food/protein. - Fixes nitrogen in the roots/soil. - Serves as Cover crop/prevents erosion. - Source of feed for live stock.