Hema Batra and Shikha Sharma Solutions for Exercise 2: CHAPTER PRACTICE

Describe the important characteristic of gymnosperms.

What were the disadvantages of an artificial system of classification?

Amrita while playing with her friend, near the pond noticed in the pond that a green colour covering is floating on the surface of the water. She discussed this with her friend and both got surprised. Next day in the school Amrita asked her teacher about the same. Teacher told her, that was nothing, but green algae which occur both in fresh and marine water habitats.

Mention the economic importance of algae. Why green algae are considered to be the ancestors of all land plants? Justify the statement by giving reasons. What values as a good biology student are reflected from Amrita's character?

Amrita while playing with her friend, near the pond noticed in the pond that a green colour covering is floating on the surface of the water. She discussed this with her friend and both got surprised. The Next day in the school Amrita asked her teacher about the same. The Teacher told her, that was nothing, but green algae which occur both in fresh and marine water habitats.

Why green algae are considered to be the ancestors of all land plants. Justify the statement by giving reasons.

Amrita while playing with her friend, near the pond noticed in the pond that a green colour covering is floating on the surface of the water. She discussed this with her friend and both got surprised. The next day in school Amrita asked her teacher about the same. The Teacher told her, that was nothing, but green algae which occur both in fresh and marine water habitats.

What values as a good biology teacher student are reflected from Amrita's character.

Describe the plant body of a moss with the help of a well-labelled diagram.

Distinguish between bryophytes and pteridophytes.

Describe the haplodiplontic life cycle.