Botany MCQs
Topic Notes: Botany
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
1
Which category of seed does a corn kernel represent?
Answer:
Albominous seed
Corn (maize) is a monocot that produces albuminous seeds. In these seeds, the endosperm remains intact at maturity, serving as the primary storage tissue for nutrients that support the embryo during the initial stages of germination.
2
Which structure forms the polyploid nutritive tissue in seeds?
Answer:
Endosperms
The primary endosperm nucleus undergoes repeated mitotic divisions to form the endosperm, a nutritive tissue that supports the developing embryo. In most angiosperms, this tissue is triploid, resulting from the fusion of two polar nuclei and one male gamete during fertilization.
3
What term is used to describe seeds in which the endosperm is completely consumed by the developing embryo?
Answer:
Exalbuminous
Exalbuminous or non-endospermic seeds are those where the endosperm is fully absorbed by the embryo during its development. Consequently, the food reserves are stored within the cotyledons rather than in a separate endosperm tissue.
4
How is the wheat seed classified based on its endosperm content?
Answer:
Albominous seed
Wheat seeds are classified as albuminous (or endospermic) because they retain a significant amount of endosperm at maturity. This stored food material is utilized by the embryo during the germination process to support early growth before the seedling becomes autotrophic.
5
What is the term for a seed that retains endosperm to provide nourishment to the developing embryo?
Answer:
A and b both
Seeds that store food in the endosperm for the developing embryo are referred to as either albuminous or endospermic seeds. Both terms are synonymous in botanical terminology, describing the same physiological state of the mature seed.