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 floral structures are primarily responsible for attracting insects to facilitate pollination?
Answer:
Sepals and petals
Petals, often brightly colored and scented, serve as the primary visual and olfactory attractants for pollinators like insects. Sepals may also contribute to the overall display. Together, these structures ensure that pollinators are drawn to the flower, increasing the likelihood of successful cross-pollination.
2
Which part of the plant is specifically adapted to receive pollen grains?
Answer:
Carpel
The carpel is the female reproductive structure of a flower. The stigma, which is the receptive surface of the carpel, is specifically adapted to capture and facilitate the germination of pollen grains during the process of pollination.
3
Which phenomenon describes the influence of pollen on the maternal tissues of the seed coat outside the embryo?
Answer:
Metaxenia
Metaxenia refers to the effect of pollen on maternal tissues, such as the seed coat or fruit, which are genetically distinct from the embryo and endosperm. This is distinct from Xenia, which refers to the effect of pollen on the embryo or endosperm tissues themselves. This phenomenon is commonly observed in certain fruits like dates.