Plant Kingdom — BIOLOGY STD 11 Science — Question

Differentiate between primary and secondary meta bolites.

What happens when a normal cell turns into a malignant cell?

1. How are microorganisms like Pseudomonas and Thiobacillus of great significance in the nitrogen cycle?
2. In which form are sulphur and magnesium obtained by plants?

Describe Geometric growth.

What is meant by (a) Cytotaxonomy and (b) Chemotaxonomy respectively?

In what form do plants absorb phosphorus from the soil? Name one cell organelle and one organic molecule that require phosphorus in the cell. List any two phosphorus deficiency symptoms in leaves.

Describe the cortex region of dicot root.

Define the following: Exocrine gland.

Write examples of two species, each belonging to same genera.