Structural Organisation in Animals — BIOLOGY STD 11 Science — Question

What are the three methods of locomotion shown by the protozoans? Mention them with an example of each.

What are the criteria used to classify fungi?

Photosynthetic organisms occur at different depths in the ocean. Do they receive qualitatively and quantitatively the same light? How do they adapt to carry out photosynthesis under these conditions?

While travelling at a higher altitude, a person complains of dizziness and vomiting sensation. Which part of the inner ear is disturbed during the journey?

What are the reasons that you can think of for the arthropods to constitute the largest group of the animal kingdom?

Give reasons for the following.

1. Plants are the lungs of nature.
2. Chlorophyll-b and other accessory pigments are necessary for photosynthesis.
3. In the high light intensities, the chlorophyll-a gets damaged.

How do plants manage exchange of gases? Give an overview of respiration in plants.

Differentiate between the following:
i. Red algae and brown algae
ii. Liverworts and moss
iii. Homosporous and heterosporous pteridophyte

Why is not any one parameter good enough to demonstrate growth throughout the life of a flowering plant?

Neha planned to go the lakeside for picnic with her friends. Suddenly they noticed a man drowning in the lake. Everyone was frightened, but Neha asked them to stop panicking and take the man out of water. After the man was rescued, he was found unconscious. Neha then suggested that mouth to mouth artificial respiration should be given to save the man. One of her friend did as she guided.

Finally, the man was saved. He thanked Neha and her friends for their help.

1. Why is artificial respiration given?
2. Can artificial respiration bring back a person to consciousness even after death?
3. What values are shown by Neha?