Farming

Q.

Anthropogenic action hastens evolution. Explain.

Q.

What are cry proteins? Name an organism that produces it. How has man exploited this protein for his benefit?

Q.

How do weeds affect the crops ?

Q.

Biological control of agricultural pests, unlike the chemical control, is

1. toxic

2. polluting

3. very expensive

4. self-perpetuating

Q.

Define the following term.

Fungicides.

Q. Which bacteria controls the soil pollution caused by acid rain?

1. Acetobacter
2. Geobacter
3. Candida
4. Acidobacillus ferroxidens

Q. Which one of the following insects produces honey?

1. Apis indica
2. Kerria lacca
3. Bombyx mori
4. Antherae paphia

Q.

Which of the following is correctly matched?

1. Pisciculture - Silk worm

2. Sericulture – Fish

3. Vermiculture – Mosquito

4. Apiculture – Honeybee

Q.

How can we protect the crop from pests?

Q.

Weeds affect the crop plants by :

1. Killing of plants in field before they grow

2. Dominating the plants to grow

3. Competing for various resources of crops causing low availability of nutrients

4. All of the above

Q. Which of the following is correctly matched?

1. Apiculture – Honeybee
2. Pisciculture - Silk worm
3. Sericulture – Fish
4. Vermiculture – Mosquito

Q.

Which pair is correct?

1. Aspergillus niger - gluconic acid and citric acid

2. Yeast - Biogas production

3. Rhizobium - Parasites of leguminous plant

4. Nostoc - Biofuel

Q. Identity the correct statement(s) related to the advantage(s) of SCP.

1. All of the above
2. Large quantities of protein can be produced within a small space.
3. Microbes used for SCP production can be grown on wastewater, animal manure, sewage, molasses, straw, etc.
4. SCP production using waste materials also reduces environmental pollution.

Q. Select the statement which is not true about Bt toxin

1. Bt toxin can harm humans if consumed
2. Bt toxin is present in the inactive form in the plant and needs alkaline pH to be activated
3. Bt toxin is encoded by Cry gene
4. Bollworm is not the only insect that is killed by Bt toxin

Q. Which of the following statement/s hold true for microbe friendly agriculture?

1. Microbe coated seeds are eco-friendly.
2. Fluoroacetamide is a bioinsecticide.
3. Insects do not spoil biotechnologically aided plants.
4. Spinosad is a biopesticide.

Q. Acid rain is mainly caused by _____ pollution.

1. air
2. soil
3. noise
4. light

Q. Tachinid flies from Antigua have been used to control green stink bugs that attack vegetable crops in Hawaii. Why did ecologists use the flies to control the stink bugs?

1. To increase the population of tachinid flies
2. To provide new critical habitat and food to the endangered tachinid fly species
3. To use a sustainable resource that is more environmentally friendly than pesticides
4. To introduce new genes into the gene pool of the stink bugs
5. To bioremediate the habitat in Hawaii

Q. Which one of the following insects produces honey?

1. Apis indica
2. Antherae paphia
3. Kerria lacca
4. Bombyx mori

Q. Given below is the list of few chemicals that are used for protection of crops
i) dalapon

1. 3
2. 4
3. 2
4. 5

Q. Which one of the following is used as biological insecticide?

1. Silkmoth
2. Tiger beetle
3. Caterpillar
4. Mazra Poka

Q. A process that uses micro-organisms to convert harmful industrial wastes to less toxic or non-toxic compounds is known as

1. Precipitation
2. Complement fixation
3. Bioremediation
4. Bioconversion

Q. Bt cotton has gene from Bacillus thuringiensis in it.

1. True
2. False

Q. Which of the following is correctly matched?

1. Pisciculture - Silk worm
2. Apiculture – Honeybee
3. Sericulture – Fish
4. Vermiculture – Mosquito

Q. Bt cotton is harmful to humans.

1. True
2. False

Q. Which of the following is used in organic farming?

1. Nocardia
2. Azotobacter
3. Geobacter
4. Actinoplanes

Q.

Which is an effective method to control mosquito breeding?

1. Use of mosquito repellents

2. Cultivation of Gambusia fishes that eat the larvae of mosquitoes

3. Antimalarial drugs

4. Regular cleaning of ponds and lakes

Q. Rotenone is

1. An insect hormone
2. A bioherbicide
3. A natural insecticide
4. A herbicide

Q. Briefly describe the role of biological control of pests and diseases.

Q. Which one is an effective plant insecticide?

1. Cinerin
2. Nicotine
3. Pyrethrin
4. All of the above

Q. $Rhizobium$ is a nitrogen fixing soil bacteria.

1. False
2. True