343722
Benefits of mycorrhizae are i. Resistance to root-borne pathogens ii. Tolerance to salinity and absorption of phosphorus iii. Tolerance to drought iv. Overall increase in the plant growth and development
1 Only i and ii
2 Only ii and iii
3 Only iii and iv
4 i, ii, iii and iv
Explanation:
Mycorrhiza is a symbiotic association between fungus and the roots of higher plants. In this association, the fungal hyphae form a closely woven mass around the rootlets or penetrate the cells of the root and enhance nutrition and water uptake by the roots of the plants. Such plants are resistant to water stress, root borne pathogens, salinity etc. The roots in turn provide essential nutrients for the growth of the fungi.
BIOXII10: MICROBES IN HUMAN WELFARE
343723
Bacillus thuringiensis forms protein crystals which contain insecticidal proteins. This protein
1 Is coded by several genes including the gene cry.
2 Binds with epithelial cells of midgut of the insect pest ultimately killing it.
3 Is activated by acidic \(\mathrm{pH}\) of the foregut of the insect pest.
4 Does not kill the carrier bacterium which is itself resistant to this toxin.
Explanation:
Cryoproteins bind with epithelial cells of midgut of the insects and ultimately leads to dead by mottling.
NEET - 2016
BIOXII10: MICROBES IN HUMAN WELFARE
343724
The majority of Baculo viruses are used as biological control agents because
1 These are excellent candidates for species specific applications
2 They have no negative impact on non target plants and animals
3 Beneficial insects are being conserved
4 All the above
Explanation:
All are correct. Baculoviruses are pathogens that attack insects and other arthropods. The majority of baculoviruses used as biological control agents are in the genus Nucleopolyhedrovirus. These viruses are excellent candidates for species-specific, narrow spectrum insecticidal applications. They have been shown to have no negative impacts on plants, mammals, birds, fish or even on non-target insects.
BIOXII10: MICROBES IN HUMAN WELFARE
343725
Match the columns I and II. Column I Column II A Khadi and village industries commission P Biocontrol B Ministry of Environment and forests Q Sewage treatment C IPM R Yamuna action plan
343722
Benefits of mycorrhizae are i. Resistance to root-borne pathogens ii. Tolerance to salinity and absorption of phosphorus iii. Tolerance to drought iv. Overall increase in the plant growth and development
1 Only i and ii
2 Only ii and iii
3 Only iii and iv
4 i, ii, iii and iv
Explanation:
Mycorrhiza is a symbiotic association between fungus and the roots of higher plants. In this association, the fungal hyphae form a closely woven mass around the rootlets or penetrate the cells of the root and enhance nutrition and water uptake by the roots of the plants. Such plants are resistant to water stress, root borne pathogens, salinity etc. The roots in turn provide essential nutrients for the growth of the fungi.
BIOXII10: MICROBES IN HUMAN WELFARE
343723
Bacillus thuringiensis forms protein crystals which contain insecticidal proteins. This protein
1 Is coded by several genes including the gene cry.
2 Binds with epithelial cells of midgut of the insect pest ultimately killing it.
3 Is activated by acidic \(\mathrm{pH}\) of the foregut of the insect pest.
4 Does not kill the carrier bacterium which is itself resistant to this toxin.
Explanation:
Cryoproteins bind with epithelial cells of midgut of the insects and ultimately leads to dead by mottling.
NEET - 2016
BIOXII10: MICROBES IN HUMAN WELFARE
343724
The majority of Baculo viruses are used as biological control agents because
1 These are excellent candidates for species specific applications
2 They have no negative impact on non target plants and animals
3 Beneficial insects are being conserved
4 All the above
Explanation:
All are correct. Baculoviruses are pathogens that attack insects and other arthropods. The majority of baculoviruses used as biological control agents are in the genus Nucleopolyhedrovirus. These viruses are excellent candidates for species-specific, narrow spectrum insecticidal applications. They have been shown to have no negative impacts on plants, mammals, birds, fish or even on non-target insects.
BIOXII10: MICROBES IN HUMAN WELFARE
343725
Match the columns I and II. Column I Column II A Khadi and village industries commission P Biocontrol B Ministry of Environment and forests Q Sewage treatment C IPM R Yamuna action plan
343722
Benefits of mycorrhizae are i. Resistance to root-borne pathogens ii. Tolerance to salinity and absorption of phosphorus iii. Tolerance to drought iv. Overall increase in the plant growth and development
1 Only i and ii
2 Only ii and iii
3 Only iii and iv
4 i, ii, iii and iv
Explanation:
Mycorrhiza is a symbiotic association between fungus and the roots of higher plants. In this association, the fungal hyphae form a closely woven mass around the rootlets or penetrate the cells of the root and enhance nutrition and water uptake by the roots of the plants. Such plants are resistant to water stress, root borne pathogens, salinity etc. The roots in turn provide essential nutrients for the growth of the fungi.
BIOXII10: MICROBES IN HUMAN WELFARE
343723
Bacillus thuringiensis forms protein crystals which contain insecticidal proteins. This protein
1 Is coded by several genes including the gene cry.
2 Binds with epithelial cells of midgut of the insect pest ultimately killing it.
3 Is activated by acidic \(\mathrm{pH}\) of the foregut of the insect pest.
4 Does not kill the carrier bacterium which is itself resistant to this toxin.
Explanation:
Cryoproteins bind with epithelial cells of midgut of the insects and ultimately leads to dead by mottling.
NEET - 2016
BIOXII10: MICROBES IN HUMAN WELFARE
343724
The majority of Baculo viruses are used as biological control agents because
1 These are excellent candidates for species specific applications
2 They have no negative impact on non target plants and animals
3 Beneficial insects are being conserved
4 All the above
Explanation:
All are correct. Baculoviruses are pathogens that attack insects and other arthropods. The majority of baculoviruses used as biological control agents are in the genus Nucleopolyhedrovirus. These viruses are excellent candidates for species-specific, narrow spectrum insecticidal applications. They have been shown to have no negative impacts on plants, mammals, birds, fish or even on non-target insects.
BIOXII10: MICROBES IN HUMAN WELFARE
343725
Match the columns I and II. Column I Column II A Khadi and village industries commission P Biocontrol B Ministry of Environment and forests Q Sewage treatment C IPM R Yamuna action plan
343722
Benefits of mycorrhizae are i. Resistance to root-borne pathogens ii. Tolerance to salinity and absorption of phosphorus iii. Tolerance to drought iv. Overall increase in the plant growth and development
1 Only i and ii
2 Only ii and iii
3 Only iii and iv
4 i, ii, iii and iv
Explanation:
Mycorrhiza is a symbiotic association between fungus and the roots of higher plants. In this association, the fungal hyphae form a closely woven mass around the rootlets or penetrate the cells of the root and enhance nutrition and water uptake by the roots of the plants. Such plants are resistant to water stress, root borne pathogens, salinity etc. The roots in turn provide essential nutrients for the growth of the fungi.
BIOXII10: MICROBES IN HUMAN WELFARE
343723
Bacillus thuringiensis forms protein crystals which contain insecticidal proteins. This protein
1 Is coded by several genes including the gene cry.
2 Binds with epithelial cells of midgut of the insect pest ultimately killing it.
3 Is activated by acidic \(\mathrm{pH}\) of the foregut of the insect pest.
4 Does not kill the carrier bacterium which is itself resistant to this toxin.
Explanation:
Cryoproteins bind with epithelial cells of midgut of the insects and ultimately leads to dead by mottling.
NEET - 2016
BIOXII10: MICROBES IN HUMAN WELFARE
343724
The majority of Baculo viruses are used as biological control agents because
1 These are excellent candidates for species specific applications
2 They have no negative impact on non target plants and animals
3 Beneficial insects are being conserved
4 All the above
Explanation:
All are correct. Baculoviruses are pathogens that attack insects and other arthropods. The majority of baculoviruses used as biological control agents are in the genus Nucleopolyhedrovirus. These viruses are excellent candidates for species-specific, narrow spectrum insecticidal applications. They have been shown to have no negative impacts on plants, mammals, birds, fish or even on non-target insects.
BIOXII10: MICROBES IN HUMAN WELFARE
343725
Match the columns I and II. Column I Column II A Khadi and village industries commission P Biocontrol B Ministry of Environment and forests Q Sewage treatment C IPM R Yamuna action plan
