Plant Growth and Development — BIOLOGY STD 11 Science — Question

Which gymnosperm provide these items?

1. Taxol.
2. Canada balsam.
3. Tannins.
4. Copal.

Biology teacher while taking class on respiration, told students that respiration is the characteristic feature of living beings, whether it is plant or animal. Ankita listened this, argued with her teacher and asked that plants do not have any structures for respiration then how can they respire. Teacher was impressed by Ankita's question and explained the students about respiration in plants.

1. In which cell organelle does respiration take place?
2. What compound is known as energy currency of the cell?
3. Where does aerobic and anaerobic respiration take place in a cell?
4. Which good quality is possessed by Ankita and her teacher?

Describe the accessory digestive glands in human.

What is the role of tongue in digestion?

Give details of flower arrangement.

Differentiate between hyperglycaemia and hypoglycaemia.

Describe the structure of the human skull.

What name is given to the body fluid of cockroach? Mention its components.

Water is not a nutrient but is very important for digestion. If a person does not drink enough water, it can lead to which of these problems? Explain the possible problems which can arise because of the situation as per your answer.

1. There will be less secretion of digestive enzymes.
2. The person may suffer from poor bowel movement; leading to constipation.

Which one of the following sets of animals belong to a single taxonomic group?

1. Cuttlefish, Jellyfish, Silverfish, Dogfish, Starfish.
2. Bat, Pigeon, Butterfly.
3. Monkey, Chimpanzee, Man.
4. Silkworm, Tapeworm, Earthworm.