Plant Growth and Development — BIOLOGY STD 11 Science — Question

If a plant is girdled, which part of the plant dies first-the root or the shoot? Answer by giving reasons.

The long bones are hollow and connected by air passage. They are the characteristics of:

1. Aves.
2. Mammals.
3. Reptilia.
4. Land vertebrates.

It is said that plants are harmed by excess water. But they are able to survive under flooded condition. Discuss the way in which plants manage the amount of excess water?

How do you distinguish between a skeletal muscle and a cardiac muscle?

What is the difference between animal and bacterial cells with respect to the presence of nucleus?

Write the names of the bones in the forelimb (hand) of a human being. Mention the respective number of each of them.

Explain heart sounds.

Which one of the following animals possesses nerve cells but no nerves?

1. Hydra.
2. Tapeworm.
3. Earthworm.
4. Frog’s tadpole.

Rashi, a class VII student was sitting with her mother (who is an editor for Biology). Her mother was insisting her to have some fruits to which Rashi refused repeatedly. Her mother tried convincing her by saying that proper diet is important for growth. Rashi argued saying that even plants grow without taking any food. To this, her mother smiled and explained her how plants make food with the help of leaves.

1. Name the term used for the process of food production in plants.
2. What are the factors required by plants for this process?
3. What are the additional function of leaves.
4. What values are shown by Rashi's mother?

Why has our understanding of plant kingdom changed over time?