Structural Organisation in Animals — BIOLOGY STD 11 Science — Question

Define a taxon. Give some examples of taxa at different hierarchical levels.

1. What is the effect of substrate concentration on the action of enzyme?
2. Distinguish between apoenzyme and coenzyme.
3. Why are amino acids also called substituted methane?

What is the benefit of cell walls, in plant cells?

Describe in detail the events in Prophase I of meiosis.

Write the difference between: Pectoral and Pelvic girdle

A man is admitted to a hospital. He is suffering from an abnormal low body temperature, loss of appetite and extreme thirst. The doctor consoled him and also prescribed brain scan as he suspected, there would be a tumour in his brain.

1. Mention the reason behind the abnormalities of the patient.
2. Which part of the brain would probably show a tumour?
3. Identify the location of hypothalamus.
4. What values of life were reflected by the doctor?

What are muscular tissues? Describe their various types.

Diatoms are also called as ‘pearls of ocean’, why? What is diatomaceous earth?

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

Differentiate between the following: Imbibition and diffusion