Animal Kingdom — BIOLOGY STD 11 Science — Question

Do different species of plants growing in the same area show the same rate of transpiration at a particular time? Justify your answer.

Alka and Anita were good neighbours and classmates too. They used to study and play together in the school and at home. Alka always gets up early in the morning and takes her breakfast properly. Anita on the contrary, used to get up late and rushes to the school in a hurry everyday. Due to her eating habits, Anita often complaint about stomachache during the School hours and also after coming back to home. All this was affecting her studies too. One day on parent's-teacher meeting, Anita's mother discussed this problem with her biology teacher, she explained that it might be due to her eating habits, skipping breakfast, playing just after lunch and also due to improper chewing of food.

1. What according to you, went wrong with Anita as she continuously complained about stomachache?
2. What is the importance of chewing food? How is it related to digestion of food?
3. How does food move forward in the alimentary canal?
4. What values, do you get from Anita's mother's behaviour?

A rubber band stretches and reverts back to its original position. Bubble gum stretches, but it would not return to its original position. Is there any difference between the two processes? Discuss it with respect to plant growth (Hint: Elasticity (reversible) Plasticity (irreversible)).

Explain the difference between ultrafiltration and selective reabsorption.

"The movement of water is through transpiration pull." Discuss if this statement is 100% true. Give explanation for your answer.

The major parts of the human neural system is depicted below. Fill in the empty boxes with appropriate words.

Explain the structure of bacteriophage with the help of well-labelled diagram.

Angiosperms are the most advanced among plants and show more variety than any other division of plants. Additionally, most of the useful plants for us belong to the division angiosperm. Which of the following lessons can be taken from this? What are the benefits of learning multiple skills in our life?

1. A diverse group of students is always good for academic learning.
2. If a student knows multiple skills, then he is more likely to become relevant for the society.
3. A student with better physical features is likely to be a better student.

Distinguish between Artificial System and Phylogenetic System.

Who discovered the nucleus? Write any five works of nuclear membrane.