Biological Classification — BIOLOGY STD 11 Science — Question

Which of the following would have a rich biodiversity; a metropolitan city; like Mumbai or a village in the hills of Meghalaya?

1. Give reasons in support of your answer.
2. Suggest some ways to maintain or enrich biodiversity in your neighbourhood.

Describe the basis on which Gap-1 phase, Synthetic phase and Gap-2 phase of cell cycle are named.

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?

Mention the basis of a (biological) classification. What educative advantage do we get from r botanical garden and r zoological park?

Mention the distinctive characters of cyanobacteria.

To get a carpet like grass lawns are mowed regularly. Is there any scientific explanation for this?

List out the functions of a museum.

Try to collect all the currently accepted meanings for the word ‘species’. Discuss with your teacher the meaning of species in case of higher plants and animals on one hand, and bacteria on the other hand.

Name one synthetic auxin that can be used as a herbicide. Give one more application of the same.

Explain the reasons of following.

1. Photosynthesis can occur in the absence of light.
2. Even non-green leaves can make the food.
3. Photosynthesis can occur under water.