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11th Standard English Medium Biology (Botany) Subject Reproductive Morphology Creative 3 Mark Questions with Solution Part - I updated Creative Questions

Published on: 13/05/2022

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Std: 11th Standard - Biology

chapter: - Creative Questions

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Questions:

Generic 3

5 x 3 = 15

Distinguish between Monoecious & Dioecious.

What are the types of seed, based on the presence and absence of the endosperm? Explain with suitable example.

Mention any three functions of fruit

List out the difference between spike and spadix

Define Corymb.

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Answers Key:

Generic 3

5 x 3 = 15

Monoecious	Dioecious
Both male and female flowers are present in the same plant. e.g., Coconut	Male and female flowers are present on separate plants. e.g., Papaya

Based on the presence or absence of the endosperm the seed is of two types
(i) Albuminous or Endospermous seed: The cotyledons are thin,membranous and mature seeds have endosperm persistent and nourishes the seedling during its early development. eg Castor, sunflower, maize.
(ii) Ex-albuminous or non-endospermous seed: Food is utilized by the developing embryo and so the mature seeds are without endosperm. In such seeds, cotyledons store food and become thick and fleshy. eg, Pea, Groundnut.

(i) Edible part of the fruit is a source of food, energy for animals.
(ii) They are source of many chemicals like sugar, pectin, organic acids, vitamins and minerals.
(iii) The fruit protects the seeds from unfavourable climatic conditions and animals.

S.No	Spike	Spadix
1	It is an unbranched indeterminate inflorescence with sessile flowers.	An inflorescence with fleshy axis bearing unisexual sessile flowers.
2	The flowers are exposed.	The flowers are covered by bract called spathe.
3	Flowers are generally bisexual. Eg: Wheat	Flowers are generally unisexual. Eg: Cocos

1. It is a type of racemose inflorescence. In corymb, the main axis is not elongated.
2. The pedicel is of unequal length.
3. The order flowers have long pedicels and the young flowers show short pedicels. so all flowers appear at the same level.
4. Eg: Caesalpinia.