Body Fluids and Circulation — BIOLOGY STD 11 Science — Question

How many ATP molecules are produced by the complete oxidation of one molecule of glucose and where?

Explain the composition of triglyceride.

Name the two groups of nephrons on the basis of their position in the kidney. How are they different from each other?

What are the modifications that are observed in birds that help them fly?

Mention the similarities between the:

1. Cardiac and skeletal muscles.
2. Cardiac and smooth muscles.

Write the precise function of:
Collenchyma.

Take one flower of the family Solanaceae and write its semi-technical description. Also draw their floral diagram.

While teaching cell division in the class, teacher told that during meiosis, the chromosome number is reduced to half of the parent, whereas during mitosis, the number remains the same. Seema was not able to recognise what teacher explained in the class and asked her elder brother, a botany student, the need of reducing chromosomes during gamete formation and what will happen if chromosome number will not reduced to its half. He explained the concept in detail to Seema.

1. In which part of the organisms does meiosis occur?
2. How does meiosis help in evolution?
3. Give the significance of meiosis.
4. What value is expressed in the behaviour of Seema's elder brother?

What is the need of a classification system in biology? How did different classification systems develop over a period of time?

What do grey and white matter in the brain represent?