Animal Kingdom — BIOLOGY STD 11 Science — Question

Differentiate between single circulation and double circulation; with an example for each.

Write the functions in brief in Column B, appropriate to the structures given in Column A.

1. Nictitating membrane __________. 
2. Tympanum __________.
3. Copulatory pad __________.

Draw or write the symbols for following:

1. Hermaphrodite (bisexual).
2. Pistillate.
3. Perianth.
4. Staminate.
5. Staminodes.
6. Ebracteolate.

Why is there no mixing of deoxygenated and oxygenated blood in the human heart normally?

The function of the brain in our body is similar to which of these? Give reasons for your answer. Comment on the possible harms of artificial intelligence.

1. The captain of the team.
2. The coach of the team.
3. Central Processing Unit of a computer.

Explain the following floral formula and to which it belongs.

Biology teacher was teaching cell cycle in the class. She taught that cell is the basis from which life exists. Also explained well about cell cycle. Robin who was a bright student was facing difficulties in understanding the topic he reached home and asked her sister who is a student of biology in a college about details of cell cycle and cell theory. She explained him that according to cell theory, cells arise from pre-existing cells and the process involved is cell division. Sexually reproducing organisms start their life from a single cell, called zygote, and cell divisions do not stop with the formation of a mature organism, but continue throughout the life.

1. What is meant by cell cycle?
2. Which is the actual phase of cell division?
3. When (at what phase) do the cell organelles duplicate?
4. What values are reflected from the Robin's concern?

Represent schematically the pathway of fermentation of lactic acid.

 

List the information that should be shown on the label of a herbarium sheet.