Question

Re-write the following sentences as instructed in the bracket.

1. Guard cells help controlling the opening and closing of stomata for gaseous exchange. (Use infinitive)

2. Algae contain chlorophyll. It imparts green colour to them.
(Join the sentence with conjunction)

3. Symbiosis is mutually benefit association between two plants.
(Re write sentence using gerund) ​

Answer 1

Answer:

1. Guard cell help to control the opening and closing of stomata for gaseous exchange.

2. algae contain chlorophyll and it imparts green colour to them.