NEET Test Series from KOTA - 10 Papers In MS WORD
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Plant kingdom
259507
Which unbranched tree hosts heterocystous symbiont in its modified roots ?
1 Pinus
2 Cycas
3 Ginkgo
4 Cedrus
Explanation:
Cycas hosts heterocystous symbiont in its modified roots. Heterocysts are specialized nitrogenfixing cells formed during nitrogen starvation by some filamentous cyanobacteriea. Heterocysts is the sites for nitrogen fixation under aerobic conditions.
TS EAMCET-30.07.2022 Shift-II
Plant kingdom
259511
Choose the correct option for the statements for Mycorrhiza: (i) It absorbs phosphorus from soil. (ii) It forms root nodules with the association of Rhizobium. (iii) They are resistance to root-borne pathogens, tolerance to salinity $\&$ drought. (iv) They fix atmospheric nitrogen.
1 (i) and (ii)
2 (i), (ii) and (iii)
3 (i) and (iii)
4 (ii) and (iv)
Explanation:
Mycorrhiza are symbiotic association between higher plant roots \& fungi. Their major role is to enhance nutrient $\&$ water uptake by the host plant. It absorbs phosphorus from soil and they are resistance to root-borne pathogens, tolerance to salinity, drought and an overall increase in plant growth and development. There are two types of mycorrhizal- ectomycorrhizae \& endomycorrhizae.
2008
Plant kingdom
259512
Which of the following statements is incorrect about gymnosperms?
1 Their seeds are not covered
2 They are heterosporous
3 Male and female gametophytes are free living
4 Most of them have narrow leaves with thick cuticle
Explanation:
Gymnosperms have naked seeds. All of them are heterosporous. Male and female gametophytes do not have independent existence hence are not free living. The male and female gametophytes of gymnosperms are highly reduced. They are dependent upon sporophytes and are not free living.
NEET-2020 Phase-II
Plant kingdom
259513
Zooidogamy is found in
1 Cedrus
2 Pinus
3 Cycas
4 Both (b) and (c)
Explanation:
Zooidogamy is a type of plant reproduction in which male gametes (antherozoids) swim in a path of water to the female gametes. It is a type of reproduction which does not involve the pollen grains. This way the anther reaches the archegonium. Zooidogamy is found in algae, bryophytes, and some gymnosperm.
259507
Which unbranched tree hosts heterocystous symbiont in its modified roots ?
1 Pinus
2 Cycas
3 Ginkgo
4 Cedrus
Explanation:
Cycas hosts heterocystous symbiont in its modified roots. Heterocysts are specialized nitrogenfixing cells formed during nitrogen starvation by some filamentous cyanobacteriea. Heterocysts is the sites for nitrogen fixation under aerobic conditions.
TS EAMCET-30.07.2022 Shift-II
Plant kingdom
259511
Choose the correct option for the statements for Mycorrhiza: (i) It absorbs phosphorus from soil. (ii) It forms root nodules with the association of Rhizobium. (iii) They are resistance to root-borne pathogens, tolerance to salinity $\&$ drought. (iv) They fix atmospheric nitrogen.
1 (i) and (ii)
2 (i), (ii) and (iii)
3 (i) and (iii)
4 (ii) and (iv)
Explanation:
Mycorrhiza are symbiotic association between higher plant roots \& fungi. Their major role is to enhance nutrient $\&$ water uptake by the host plant. It absorbs phosphorus from soil and they are resistance to root-borne pathogens, tolerance to salinity, drought and an overall increase in plant growth and development. There are two types of mycorrhizal- ectomycorrhizae \& endomycorrhizae.
2008
Plant kingdom
259512
Which of the following statements is incorrect about gymnosperms?
1 Their seeds are not covered
2 They are heterosporous
3 Male and female gametophytes are free living
4 Most of them have narrow leaves with thick cuticle
Explanation:
Gymnosperms have naked seeds. All of them are heterosporous. Male and female gametophytes do not have independent existence hence are not free living. The male and female gametophytes of gymnosperms are highly reduced. They are dependent upon sporophytes and are not free living.
NEET-2020 Phase-II
Plant kingdom
259513
Zooidogamy is found in
1 Cedrus
2 Pinus
3 Cycas
4 Both (b) and (c)
Explanation:
Zooidogamy is a type of plant reproduction in which male gametes (antherozoids) swim in a path of water to the female gametes. It is a type of reproduction which does not involve the pollen grains. This way the anther reaches the archegonium. Zooidogamy is found in algae, bryophytes, and some gymnosperm.
259507
Which unbranched tree hosts heterocystous symbiont in its modified roots ?
1 Pinus
2 Cycas
3 Ginkgo
4 Cedrus
Explanation:
Cycas hosts heterocystous symbiont in its modified roots. Heterocysts are specialized nitrogenfixing cells formed during nitrogen starvation by some filamentous cyanobacteriea. Heterocysts is the sites for nitrogen fixation under aerobic conditions.
TS EAMCET-30.07.2022 Shift-II
Plant kingdom
259511
Choose the correct option for the statements for Mycorrhiza: (i) It absorbs phosphorus from soil. (ii) It forms root nodules with the association of Rhizobium. (iii) They are resistance to root-borne pathogens, tolerance to salinity $\&$ drought. (iv) They fix atmospheric nitrogen.
1 (i) and (ii)
2 (i), (ii) and (iii)
3 (i) and (iii)
4 (ii) and (iv)
Explanation:
Mycorrhiza are symbiotic association between higher plant roots \& fungi. Their major role is to enhance nutrient $\&$ water uptake by the host plant. It absorbs phosphorus from soil and they are resistance to root-borne pathogens, tolerance to salinity, drought and an overall increase in plant growth and development. There are two types of mycorrhizal- ectomycorrhizae \& endomycorrhizae.
2008
Plant kingdom
259512
Which of the following statements is incorrect about gymnosperms?
1 Their seeds are not covered
2 They are heterosporous
3 Male and female gametophytes are free living
4 Most of them have narrow leaves with thick cuticle
Explanation:
Gymnosperms have naked seeds. All of them are heterosporous. Male and female gametophytes do not have independent existence hence are not free living. The male and female gametophytes of gymnosperms are highly reduced. They are dependent upon sporophytes and are not free living.
NEET-2020 Phase-II
Plant kingdom
259513
Zooidogamy is found in
1 Cedrus
2 Pinus
3 Cycas
4 Both (b) and (c)
Explanation:
Zooidogamy is a type of plant reproduction in which male gametes (antherozoids) swim in a path of water to the female gametes. It is a type of reproduction which does not involve the pollen grains. This way the anther reaches the archegonium. Zooidogamy is found in algae, bryophytes, and some gymnosperm.
259507
Which unbranched tree hosts heterocystous symbiont in its modified roots ?
1 Pinus
2 Cycas
3 Ginkgo
4 Cedrus
Explanation:
Cycas hosts heterocystous symbiont in its modified roots. Heterocysts are specialized nitrogenfixing cells formed during nitrogen starvation by some filamentous cyanobacteriea. Heterocysts is the sites for nitrogen fixation under aerobic conditions.
TS EAMCET-30.07.2022 Shift-II
Plant kingdom
259511
Choose the correct option for the statements for Mycorrhiza: (i) It absorbs phosphorus from soil. (ii) It forms root nodules with the association of Rhizobium. (iii) They are resistance to root-borne pathogens, tolerance to salinity $\&$ drought. (iv) They fix atmospheric nitrogen.
1 (i) and (ii)
2 (i), (ii) and (iii)
3 (i) and (iii)
4 (ii) and (iv)
Explanation:
Mycorrhiza are symbiotic association between higher plant roots \& fungi. Their major role is to enhance nutrient $\&$ water uptake by the host plant. It absorbs phosphorus from soil and they are resistance to root-borne pathogens, tolerance to salinity, drought and an overall increase in plant growth and development. There are two types of mycorrhizal- ectomycorrhizae \& endomycorrhizae.
2008
Plant kingdom
259512
Which of the following statements is incorrect about gymnosperms?
1 Their seeds are not covered
2 They are heterosporous
3 Male and female gametophytes are free living
4 Most of them have narrow leaves with thick cuticle
Explanation:
Gymnosperms have naked seeds. All of them are heterosporous. Male and female gametophytes do not have independent existence hence are not free living. The male and female gametophytes of gymnosperms are highly reduced. They are dependent upon sporophytes and are not free living.
NEET-2020 Phase-II
Plant kingdom
259513
Zooidogamy is found in
1 Cedrus
2 Pinus
3 Cycas
4 Both (b) and (c)
Explanation:
Zooidogamy is a type of plant reproduction in which male gametes (antherozoids) swim in a path of water to the female gametes. It is a type of reproduction which does not involve the pollen grains. This way the anther reaches the archegonium. Zooidogamy is found in algae, bryophytes, and some gymnosperm.
