259790
Which of the following is the result of double fertilization ?
1 Cotyledon
2 Nucellus
3 Endosperm
4 None of these
Explanation:
Double fertilization present in flowering plant is a result of sexual reproduction in which two male gametophyte i.e. generative nucleus and vegetative nucleus are fused with egg cells and polar nuclei. Fertilization of one male gamete with polar body (nuclei) endosperm is formed which is triploid in nature.
Punjab MET-2006
Plant kingdom
259791
Respiratory roots in halophytes are positively
1 Phototropic
2 Aerotropic
3 Rheotropic
4 Geotropic
Explanation:
The growth movement in response to air is called aerotropism. In halophytes, such as mangrove tress, there are respiratory roots called pneumatophores. These roots facilitate geseous exchange in marshy land.
BVP-2014
Plant kingdom
259792
A example of CAM plant is
1 black night shade (Solanum nigrum)
2 lemon grass (Cymbopagon flexuosus)
3 sugarbeet (Beta vulgaris)
4 snake plant (Sansevieria trifasciata)
Explanation:
Snake plant is as example of CAM plant. In day time, they close their stomata to save water and at night they open up and store $\mathrm{CO}_{2}$ in the form of an organic acid. Snake plant use the CAM process of photosynthesis.
AMU-2015
Plant kingdom
259793
Number of chromosomes in an angiospermic plant is 14 , then the number of chromosomes in synergid cells will be
1 14
2 7
3 28
4 21
Explanation:
Angiospermic plants are diploid in nature. Synergids are part of female gametophyte and are haploid in nature. Thus, if the angiosperms plant cell has $2 \mathrm{n}=14$, synergies will have $\mathrm{n}=7$. because it develops by reductional division.
259790
Which of the following is the result of double fertilization ?
1 Cotyledon
2 Nucellus
3 Endosperm
4 None of these
Explanation:
Double fertilization present in flowering plant is a result of sexual reproduction in which two male gametophyte i.e. generative nucleus and vegetative nucleus are fused with egg cells and polar nuclei. Fertilization of one male gamete with polar body (nuclei) endosperm is formed which is triploid in nature.
Punjab MET-2006
Plant kingdom
259791
Respiratory roots in halophytes are positively
1 Phototropic
2 Aerotropic
3 Rheotropic
4 Geotropic
Explanation:
The growth movement in response to air is called aerotropism. In halophytes, such as mangrove tress, there are respiratory roots called pneumatophores. These roots facilitate geseous exchange in marshy land.
BVP-2014
Plant kingdom
259792
A example of CAM plant is
1 black night shade (Solanum nigrum)
2 lemon grass (Cymbopagon flexuosus)
3 sugarbeet (Beta vulgaris)
4 snake plant (Sansevieria trifasciata)
Explanation:
Snake plant is as example of CAM plant. In day time, they close their stomata to save water and at night they open up and store $\mathrm{CO}_{2}$ in the form of an organic acid. Snake plant use the CAM process of photosynthesis.
AMU-2015
Plant kingdom
259793
Number of chromosomes in an angiospermic plant is 14 , then the number of chromosomes in synergid cells will be
1 14
2 7
3 28
4 21
Explanation:
Angiospermic plants are diploid in nature. Synergids are part of female gametophyte and are haploid in nature. Thus, if the angiosperms plant cell has $2 \mathrm{n}=14$, synergies will have $\mathrm{n}=7$. because it develops by reductional division.
259790
Which of the following is the result of double fertilization ?
1 Cotyledon
2 Nucellus
3 Endosperm
4 None of these
Explanation:
Double fertilization present in flowering plant is a result of sexual reproduction in which two male gametophyte i.e. generative nucleus and vegetative nucleus are fused with egg cells and polar nuclei. Fertilization of one male gamete with polar body (nuclei) endosperm is formed which is triploid in nature.
Punjab MET-2006
Plant kingdom
259791
Respiratory roots in halophytes are positively
1 Phototropic
2 Aerotropic
3 Rheotropic
4 Geotropic
Explanation:
The growth movement in response to air is called aerotropism. In halophytes, such as mangrove tress, there are respiratory roots called pneumatophores. These roots facilitate geseous exchange in marshy land.
BVP-2014
Plant kingdom
259792
A example of CAM plant is
1 black night shade (Solanum nigrum)
2 lemon grass (Cymbopagon flexuosus)
3 sugarbeet (Beta vulgaris)
4 snake plant (Sansevieria trifasciata)
Explanation:
Snake plant is as example of CAM plant. In day time, they close their stomata to save water and at night they open up and store $\mathrm{CO}_{2}$ in the form of an organic acid. Snake plant use the CAM process of photosynthesis.
AMU-2015
Plant kingdom
259793
Number of chromosomes in an angiospermic plant is 14 , then the number of chromosomes in synergid cells will be
1 14
2 7
3 28
4 21
Explanation:
Angiospermic plants are diploid in nature. Synergids are part of female gametophyte and are haploid in nature. Thus, if the angiosperms plant cell has $2 \mathrm{n}=14$, synergies will have $\mathrm{n}=7$. because it develops by reductional division.
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Plant kingdom
259790
Which of the following is the result of double fertilization ?
1 Cotyledon
2 Nucellus
3 Endosperm
4 None of these
Explanation:
Double fertilization present in flowering plant is a result of sexual reproduction in which two male gametophyte i.e. generative nucleus and vegetative nucleus are fused with egg cells and polar nuclei. Fertilization of one male gamete with polar body (nuclei) endosperm is formed which is triploid in nature.
Punjab MET-2006
Plant kingdom
259791
Respiratory roots in halophytes are positively
1 Phototropic
2 Aerotropic
3 Rheotropic
4 Geotropic
Explanation:
The growth movement in response to air is called aerotropism. In halophytes, such as mangrove tress, there are respiratory roots called pneumatophores. These roots facilitate geseous exchange in marshy land.
BVP-2014
Plant kingdom
259792
A example of CAM plant is
1 black night shade (Solanum nigrum)
2 lemon grass (Cymbopagon flexuosus)
3 sugarbeet (Beta vulgaris)
4 snake plant (Sansevieria trifasciata)
Explanation:
Snake plant is as example of CAM plant. In day time, they close their stomata to save water and at night they open up and store $\mathrm{CO}_{2}$ in the form of an organic acid. Snake plant use the CAM process of photosynthesis.
AMU-2015
Plant kingdom
259793
Number of chromosomes in an angiospermic plant is 14 , then the number of chromosomes in synergid cells will be
1 14
2 7
3 28
4 21
Explanation:
Angiospermic plants are diploid in nature. Synergids are part of female gametophyte and are haploid in nature. Thus, if the angiosperms plant cell has $2 \mathrm{n}=14$, synergies will have $\mathrm{n}=7$. because it develops by reductional division.
