The symbiotic association exists between coralloid roots of cycas and cells of Anabaena (a bluegreen alga). These coralloid roots are produced in the cluster at the base of the stem which because of its apogeotropic growth produce out over the ground. It is dichotomously branched and is in symbiosis with Anabaena allowing nitrogen fixation.
Punjab MET-1999
Plant kingdom
259589
No vessels are found in the wood of
1 Pine
2 Eucalyptus
3 Teak
4 Shesham
Explanation:
Vessel form the primary component of xylem and they are dead cell at maturity. The secondary xylem without vessels is called non-porous wood. It is found in the wood of gymnosperms. For example, Pine in which no vessels are found in the wood.
AMU-2015
Plant kingdom
259590
Mycorrhizal association is must for growth of
1 Mushrooms
2 Orchids
3 Sal and teak
4 None of these
Explanation:
Mycorrhiza is the product of a symbiotic association between fungi and plants. The seedling of orchids fail to grow longer unless they develop mycorrhizal association. Hence, orchids are usually propagated by vegetative means rather than by seeds.
BCECE-2011
Plant kingdom
259591
Mycorrhiza acts as:
1 root
2 mechanical support
3 root hairs with an advanced absorption capacity
4 an organism
Explanation:
The mycorrhiza is the symbiotic relationship between plants and fungi of its host plant. A hair-like outgrowth of a plant root, which absorbs water and minerals from the soil. The root hairs are tubular extensions of the epidermis. It absorb nutrients and trans-located them back to the host plant.
The symbiotic association exists between coralloid roots of cycas and cells of Anabaena (a bluegreen alga). These coralloid roots are produced in the cluster at the base of the stem which because of its apogeotropic growth produce out over the ground. It is dichotomously branched and is in symbiosis with Anabaena allowing nitrogen fixation.
Punjab MET-1999
Plant kingdom
259589
No vessels are found in the wood of
1 Pine
2 Eucalyptus
3 Teak
4 Shesham
Explanation:
Vessel form the primary component of xylem and they are dead cell at maturity. The secondary xylem without vessels is called non-porous wood. It is found in the wood of gymnosperms. For example, Pine in which no vessels are found in the wood.
AMU-2015
Plant kingdom
259590
Mycorrhizal association is must for growth of
1 Mushrooms
2 Orchids
3 Sal and teak
4 None of these
Explanation:
Mycorrhiza is the product of a symbiotic association between fungi and plants. The seedling of orchids fail to grow longer unless they develop mycorrhizal association. Hence, orchids are usually propagated by vegetative means rather than by seeds.
BCECE-2011
Plant kingdom
259591
Mycorrhiza acts as:
1 root
2 mechanical support
3 root hairs with an advanced absorption capacity
4 an organism
Explanation:
The mycorrhiza is the symbiotic relationship between plants and fungi of its host plant. A hair-like outgrowth of a plant root, which absorbs water and minerals from the soil. The root hairs are tubular extensions of the epidermis. It absorb nutrients and trans-located them back to the host plant.
The symbiotic association exists between coralloid roots of cycas and cells of Anabaena (a bluegreen alga). These coralloid roots are produced in the cluster at the base of the stem which because of its apogeotropic growth produce out over the ground. It is dichotomously branched and is in symbiosis with Anabaena allowing nitrogen fixation.
Punjab MET-1999
Plant kingdom
259589
No vessels are found in the wood of
1 Pine
2 Eucalyptus
3 Teak
4 Shesham
Explanation:
Vessel form the primary component of xylem and they are dead cell at maturity. The secondary xylem without vessels is called non-porous wood. It is found in the wood of gymnosperms. For example, Pine in which no vessels are found in the wood.
AMU-2015
Plant kingdom
259590
Mycorrhizal association is must for growth of
1 Mushrooms
2 Orchids
3 Sal and teak
4 None of these
Explanation:
Mycorrhiza is the product of a symbiotic association between fungi and plants. The seedling of orchids fail to grow longer unless they develop mycorrhizal association. Hence, orchids are usually propagated by vegetative means rather than by seeds.
BCECE-2011
Plant kingdom
259591
Mycorrhiza acts as:
1 root
2 mechanical support
3 root hairs with an advanced absorption capacity
4 an organism
Explanation:
The mycorrhiza is the symbiotic relationship between plants and fungi of its host plant. A hair-like outgrowth of a plant root, which absorbs water and minerals from the soil. The root hairs are tubular extensions of the epidermis. It absorb nutrients and trans-located them back to the host plant.
The symbiotic association exists between coralloid roots of cycas and cells of Anabaena (a bluegreen alga). These coralloid roots are produced in the cluster at the base of the stem which because of its apogeotropic growth produce out over the ground. It is dichotomously branched and is in symbiosis with Anabaena allowing nitrogen fixation.
Punjab MET-1999
Plant kingdom
259589
No vessels are found in the wood of
1 Pine
2 Eucalyptus
3 Teak
4 Shesham
Explanation:
Vessel form the primary component of xylem and they are dead cell at maturity. The secondary xylem without vessels is called non-porous wood. It is found in the wood of gymnosperms. For example, Pine in which no vessels are found in the wood.
AMU-2015
Plant kingdom
259590
Mycorrhizal association is must for growth of
1 Mushrooms
2 Orchids
3 Sal and teak
4 None of these
Explanation:
Mycorrhiza is the product of a symbiotic association between fungi and plants. The seedling of orchids fail to grow longer unless they develop mycorrhizal association. Hence, orchids are usually propagated by vegetative means rather than by seeds.
BCECE-2011
Plant kingdom
259591
Mycorrhiza acts as:
1 root
2 mechanical support
3 root hairs with an advanced absorption capacity
4 an organism
Explanation:
The mycorrhiza is the symbiotic relationship between plants and fungi of its host plant. A hair-like outgrowth of a plant root, which absorbs water and minerals from the soil. The root hairs are tubular extensions of the epidermis. It absorb nutrients and trans-located them back to the host plant.
