B Primary root is positively geotropic and positively hydrotropic. It is the basic component of root systems, As the roots always grow in the downward direction or in the direction of the force of gravity they are regarded as positively geotropic. Roots are showing their positive hydrotropic nature. Who the root grows towards the presence of the moisture content then the roots are known as positively hydrotropic.
BHU PMT (Mains)-2008
Morphology of Plants
62190
Breathing roots are found in:
1 Rhizophora
2 Epiphytes
3 Avicennia
4 Both (a) and (c)
Explanation:
D Breathing roots are seen in Avicennia and Rhizophora plant. Avicennia have pneumatophores that project above the mud to facilitate gas exchange for the submerged primary roots. Pneumatophores or breathing roots are respiratory roots found in halophytes such as mangroves. Pneumatophores have open pores in the air called lenticels which help in absorbing \(\mathrm{O}_{2}\) directly from the air.
BHU PMT (Mains)-2011
Morphology of Plants
62191
Haustorial root is exceptional to:
1 Zea mays
2 Cactus
3 Cuscuta
4 Orchids
Explanation:
C Haustorial root is exceptional to 'Cuscuta', Haustorial root is an underground portion of the plant that takes water and nutrients from the soil and serves as a string anchor few the plant. Cuscuta is the total stem parasitic plant which possesses haustorial roots for absorption of nutrients from the host plant.
BHU PMT (Mains)-2011
Morphology of Plants
62192
Fibrous root system is better adapted than tap root system for :
1 transport organic matter
2 absorption of water and minerals
3 storage of food
4 anchorage of plant to soil
Explanation:
D Fibrous root systems consists of many fine hair like roots that form a thick mat below the surface. These root systems are very effective at water and mineral absorption as well as plant stabilization. This root systems help prevent soil erosion as they anchor plants to the top layer of soil fibrous roots provide better and firm anchorage to the plant. It helps the plants of anchorage to soil very firmly.
B Primary root is positively geotropic and positively hydrotropic. It is the basic component of root systems, As the roots always grow in the downward direction or in the direction of the force of gravity they are regarded as positively geotropic. Roots are showing their positive hydrotropic nature. Who the root grows towards the presence of the moisture content then the roots are known as positively hydrotropic.
BHU PMT (Mains)-2008
Morphology of Plants
62190
Breathing roots are found in:
1 Rhizophora
2 Epiphytes
3 Avicennia
4 Both (a) and (c)
Explanation:
D Breathing roots are seen in Avicennia and Rhizophora plant. Avicennia have pneumatophores that project above the mud to facilitate gas exchange for the submerged primary roots. Pneumatophores or breathing roots are respiratory roots found in halophytes such as mangroves. Pneumatophores have open pores in the air called lenticels which help in absorbing \(\mathrm{O}_{2}\) directly from the air.
BHU PMT (Mains)-2011
Morphology of Plants
62191
Haustorial root is exceptional to:
1 Zea mays
2 Cactus
3 Cuscuta
4 Orchids
Explanation:
C Haustorial root is exceptional to 'Cuscuta', Haustorial root is an underground portion of the plant that takes water and nutrients from the soil and serves as a string anchor few the plant. Cuscuta is the total stem parasitic plant which possesses haustorial roots for absorption of nutrients from the host plant.
BHU PMT (Mains)-2011
Morphology of Plants
62192
Fibrous root system is better adapted than tap root system for :
1 transport organic matter
2 absorption of water and minerals
3 storage of food
4 anchorage of plant to soil
Explanation:
D Fibrous root systems consists of many fine hair like roots that form a thick mat below the surface. These root systems are very effective at water and mineral absorption as well as plant stabilization. This root systems help prevent soil erosion as they anchor plants to the top layer of soil fibrous roots provide better and firm anchorage to the plant. It helps the plants of anchorage to soil very firmly.
B Primary root is positively geotropic and positively hydrotropic. It is the basic component of root systems, As the roots always grow in the downward direction or in the direction of the force of gravity they are regarded as positively geotropic. Roots are showing their positive hydrotropic nature. Who the root grows towards the presence of the moisture content then the roots are known as positively hydrotropic.
BHU PMT (Mains)-2008
Morphology of Plants
62190
Breathing roots are found in:
1 Rhizophora
2 Epiphytes
3 Avicennia
4 Both (a) and (c)
Explanation:
D Breathing roots are seen in Avicennia and Rhizophora plant. Avicennia have pneumatophores that project above the mud to facilitate gas exchange for the submerged primary roots. Pneumatophores or breathing roots are respiratory roots found in halophytes such as mangroves. Pneumatophores have open pores in the air called lenticels which help in absorbing \(\mathrm{O}_{2}\) directly from the air.
BHU PMT (Mains)-2011
Morphology of Plants
62191
Haustorial root is exceptional to:
1 Zea mays
2 Cactus
3 Cuscuta
4 Orchids
Explanation:
C Haustorial root is exceptional to 'Cuscuta', Haustorial root is an underground portion of the plant that takes water and nutrients from the soil and serves as a string anchor few the plant. Cuscuta is the total stem parasitic plant which possesses haustorial roots for absorption of nutrients from the host plant.
BHU PMT (Mains)-2011
Morphology of Plants
62192
Fibrous root system is better adapted than tap root system for :
1 transport organic matter
2 absorption of water and minerals
3 storage of food
4 anchorage of plant to soil
Explanation:
D Fibrous root systems consists of many fine hair like roots that form a thick mat below the surface. These root systems are very effective at water and mineral absorption as well as plant stabilization. This root systems help prevent soil erosion as they anchor plants to the top layer of soil fibrous roots provide better and firm anchorage to the plant. It helps the plants of anchorage to soil very firmly.
B Primary root is positively geotropic and positively hydrotropic. It is the basic component of root systems, As the roots always grow in the downward direction or in the direction of the force of gravity they are regarded as positively geotropic. Roots are showing their positive hydrotropic nature. Who the root grows towards the presence of the moisture content then the roots are known as positively hydrotropic.
BHU PMT (Mains)-2008
Morphology of Plants
62190
Breathing roots are found in:
1 Rhizophora
2 Epiphytes
3 Avicennia
4 Both (a) and (c)
Explanation:
D Breathing roots are seen in Avicennia and Rhizophora plant. Avicennia have pneumatophores that project above the mud to facilitate gas exchange for the submerged primary roots. Pneumatophores or breathing roots are respiratory roots found in halophytes such as mangroves. Pneumatophores have open pores in the air called lenticels which help in absorbing \(\mathrm{O}_{2}\) directly from the air.
BHU PMT (Mains)-2011
Morphology of Plants
62191
Haustorial root is exceptional to:
1 Zea mays
2 Cactus
3 Cuscuta
4 Orchids
Explanation:
C Haustorial root is exceptional to 'Cuscuta', Haustorial root is an underground portion of the plant that takes water and nutrients from the soil and serves as a string anchor few the plant. Cuscuta is the total stem parasitic plant which possesses haustorial roots for absorption of nutrients from the host plant.
BHU PMT (Mains)-2011
Morphology of Plants
62192
Fibrous root system is better adapted than tap root system for :
1 transport organic matter
2 absorption of water and minerals
3 storage of food
4 anchorage of plant to soil
Explanation:
D Fibrous root systems consists of many fine hair like roots that form a thick mat below the surface. These root systems are very effective at water and mineral absorption as well as plant stabilization. This root systems help prevent soil erosion as they anchor plants to the top layer of soil fibrous roots provide better and firm anchorage to the plant. It helps the plants of anchorage to soil very firmly.
