Transport in Plants — BIOLOGY STD 11 Science — Question

Anurag and Amit (students of class XIth) were best friends, one day during the lunch time Anurag gave naashpati (Pyrus) to Amit (as he was fond of that). Amit refused to eat it because he did not like them due to their hardness as compared to apples. Anurag reached home and told her mother (a botanist) that he will also not eat naashpati's. His mother corrected him and told him that he should eat it, as it contains the calcium for the growth of the body.

1. What is the reason for the difference in the softness in apple and naashpati fruits?
2. What are sclereids?
3. What values are inferred from mother's of Anurag's character?

Answer briefly: How do you perceive the colour of an object?

Given below is the scientific name of Mango. Identify the correctly written name.Mangifera Indica
Mangifera indica

Rani was amazed to read about the layers and coverings in the plant. As her teacher taught her that like mammals, plants are also formed by various layers of tissues. Thus, forming the different plant system. As the epidermal tissue system forms the outermost covering of the body. She felt curious and asked her elder sister about the same, that how come this is possible. Her sister cleared all her doubts patiently.

1. From where it is derived?
2. Why are outer wall of some plants is cutinised?
3. In some cases, the cuticle is reinforced by a layer of wax. Explain the reason.
4. Extract the message from Rani's behavior.

1. What is partial pressure of a gas?
2. List two factors which affect the rate of diffusion of a gas.
3. Delhi is a highly polluted city and there is a rise in the number of individuals experiencing difficulty in breathing due to inflammation of bronchi and bronchioles. Name the disorder.

What are neurotransmitters? Where are they present? Mention their functions in our body.

Describe how Englemann arrived at the first action spectrum of photosynthesis.

Radial symmetry is often exhibited by animals having:

1. One opening of alimentary canal.
2. Aquatic mode of living.
3. Benthos/ sedentary.
4. Ciliary mode of feeding.

Give four examples of plant parts where sclereids are present.