CBSE Class 12 Biology HOTs All Chapters Set 01

BIOLOGY - XII

01

REPRODUCTION IN ORGANISMS

HOTS (Questions)

1. What is the terminology for the concept of group immortality?

2. Life span of May fly is 01 day while that of Banyan tree can be 200 yrs. What message do you get from this data concerning BMR (Basic Metabolic Rate)?

3. In a pond you see green colour long filaments, which is a type of algae consisting of single layer aggregation of vertically arranged cells. What sort of strategy can this type of cellular aggregation adopt for multiplication?

4. Differentiate the following diagrams based on the process going on :-

5. “Any organic material kept in moist and dark conditions gets infected with fungus, although there was no sign of fungus prior to it.” How fungus does make it possible, although it is a microbe?

6. Potato is a food source but small potatoes are generally called as potato seeds, so they are directly used for cropping purposes. How a farmer does get a new plant from such a potato seed?

REPRODUCTION IN ORGANISMS

ANSWERS

1. Reproduction.

2. Small animals have more BMR, hence short life span.

3. Fragmentation (vegetative method).

4. Binary fission: Irregular in Amoeba, longitudinal in Euglena.

5. Reproduction by sporulation. Spores are dry, light, easily dispersed by wind so they can reach every corner of the biosphere.

6. Potato has small eyes bearing buds which grow to form daughter plants.