Weeds

Q.

Name two weeds with broad leaves.

Q.

Weeds are important and useful.

1. True
2. False

Q.

What is true about weeds:

1. All plants other than crops are weeds

2. Some weeds can be eaten by us

3. The best time for the removal of weeds is before they produce flowers and seed

4. All of the above

Q. The bacterium which is used as a biopesticide is _______.

1. Rhizobium
2. Bacillus thuringiensis
3. Thiomargarita namibiensis
4. Lactobacillus

Q. Consider the following statements about weeding and identify the incorrect one.

1. Weeding is best done during tilling itself.
2. Weeding is usually done manually or using weedicides.
3. Weeding is the process of removal of weeds.
4. Weeding is the process of growing weed.

Q. Which of the following is NOT correct about Bacillus thuringiensis?

1. It can kill harmful bacteria.
2. It can be sprayed on plants.
3. It can kill insects.
4. It's toxin has been genetically engineered.

Q. Which of the following is NOT correct about Bacillus thuringiensis?

1. It can be sprayed on plants.
2. It can kill insects.
3. It can kill harmful bacteria.
4. It's toxin has been genetically engineered.

Q. Which of the following statement can be related to weed?

1. A weed is a plant considered desirable in a all situations.
   
2. A weed is a plant considered desirable in a particular situation
   
3. A weed is a plant considered undesirable in a particular situation
   
4. A weed is a plant considered undesirable in all situations.