PART - 1 - Unit I : CH - 2 Biological Classification — BIOLOGY STD 11 Science — Question

Respiratory pathway is believed to be a catabolic pathway. However, nature of TCA cycle is amphibolic. Explain.

What is photorespiration?

What is hemodialysis? Describe the various stages of its process.

Write the difference between: Pectoral and Pelvic girdle

Cross pollination is necessary for bringing variations in plants; while self pollination does not bring variations. Find a similar statement from the following. Explain the benefits of cross pollination of ideas.

1. Inter-caste marriages are good for bringing cross-cultural assimilation; while same-caste marriages are not.
2. Interacting with people of different mindsets can enrich our thought, while sticking to interacting with like-minded people can stunt our mental development.
3. We should respect the feelings of all religions and cultures.

Explain the structure of thoracic chamber.

State any three functions of indole acetic acid in plants.

Name the following:

1. A poisonous mushroom having white spores.
2. Edible Basidiomycetes.
3. Fungus used in brewing industry.
4. It is searched by trained pets.
5. Root-like, cards-like hyphal masses having a distinct growing point.
6. Non-motile meiospores develop in Basidiomycetes.
7. Compact groups of hyphae produced to overcome unfavourable conditions.

Briefly describe the external structure of the human heart by drawing a diagram.

For completion of respiration process, write the given steps in sequential manner.

1. Diffusion of gases (O₂ and CO₂) across alveolar membrane.
2. Transport of gases by blood.
3. Utilisation of O₂ by the cells for catabolic reactions and resultant release of CO₂ .
4. Pulmonary ventilation by which atmos-pheric air is drawn in and CO₂ rich alveolar air is released out.
5. Diffusion of O₂ and CO₂ between blood and tissues.