BioNotesFood and Health - Competency Based & Assertion-Reasoning Questions
Practice questions testing deep understanding of nutrition, balanced diets, and deficiency diseases, including case studies and assertion-reasoning formats.
Plant Reproduction - Competency Based & Assertion-Reasoning Questions
Practice questions testing deep understanding of asexual and sexual reproduction in plants, seed dispersal, and germination.
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Online
Practice questions testing deep understanding of plant pollination, agents of pollination, and adaptations.
Test your knowledge of how plants pollinate with these advanced, application-based questions.
Read the following scenario and answer the questions: Scenario: Anika was observing the garden at night and noticed some large, white flowers that were blooming and emitting a very strong, sweet fragrance. She noticed that unlike the bright red and yellow flowers that bloomed during the day and attracted bees, these white flowers seemed to only open when it was dark.
Q1. Based on Anika's observations, what is the most likely agent of pollination for these white, night-blooming flowers? Give a reason for your answer.
Q2. If a heavy rainstorm washes away all the nectar and scent from these flowers right as they open, how will this impact the plant's life cycle?
Q3. A farmer grows papaya trees. He notices that one of his papaya trees produces beautiful flowers every year but never bears any fruit, while the tree next to it produces both flowers and fruits. What biological explanation can you provide for the tree that only produces flowers?
Q4. Wheat and corn plants produce large amounts of light, dry, and smooth pollen grains, and their flowers are small and dull. Why do these plants produce such vast quantities of pollen compared to a rose bush?
Directions: For the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option: (a) Both A and R are true and R is the correct explanation of A. (b) Both A and R are true but R is not the correct explanation of A. (c) A is true but R is false. (d) A is false but R is true.
Q5. Assertion (A): Cross-pollination usually produces healthier and stronger seeds than self-pollination. Reason (R): Cross-pollination introduces genetic variation by combining the traits of two different plants of the same species.
Q6. Assertion (A): The stigma of wind-pollinated flowers is usually feathery and sticky. Reason (R): A feathery and sticky stigma helps to easily catch the light pollen grains drifting in the air.
Q7. Assertion (A): Brightly colored petals are essential for water-pollinated plants like Hydrilla. Reason (R): Insects are attracted to bright colors to help transfer pollen underwater.
Q8. Due to excessive use of chemical pesticides in a particular farming region, the local bee population has been completely wiped out. Analyze the chain of events this will cause on the local ecosystem and the farmers' crop yield.
Food and Health - Competency Based & Assertion-Reasoning Questions
Practice questions testing deep understanding of nutrition, balanced diets, and deficiency diseases, including case studies and assertion-reasoning formats.
Plant Reproduction - Competency Based & Assertion-Reasoning Questions
Practice questions testing deep understanding of asexual and sexual reproduction in plants, seed dispersal, and germination.