Description : Tyloses are: (a) Lactiferous channels (b) Secretory cells (c) Sieve plates (d) Tracheal plugs plugging the lumen of vessels and tracheids
Last Answer : Ans. ((d))
Description : What are xylem vessels and tracheids?
Last Answer : Xylem vessels consist of series of elongated dead cells joined together forming end to end tube like structure for conduction of water and salts
Description : An organised and differentiated cellular structure having cytoplasm but no nucleus is (a) vessels (b) xylem parenchyma (c) sieve tubes (d) tracheids.
Last Answer : (c) sieve tubes
Description : Which of the following statements is true? (a) Vessels are multicellular with wide lumen. (b) Tracheids are multicellular with narrow lumen. (c) Vessels are unicellular with narrow lumen. (d) Tracheids are unicellular with wide lumen.
Last Answer : (a) Vessels are multicellular with wide lumen
Description : The chief water conducting elements of xylem in gymnosperms are (a) vessels (b) fibres (c) transfusion tissue (d) tracheids.
Last Answer : (d) tracheids.
Last Answer : (a) Vessels are multicellular with wide lumen.
Description : The chief water conducting elements of xylem in gymnosperms are (a) vessels (b) fibres (c) transfusion tissue (d) tracheids
Last Answer : d) tracheids.
Description : Chief function of phloem is conduction of: (a) Food (b) Minerals (c) Water (d) Air
Last Answer : Ans. ((a))
Description : Wood without xylem vessels are called as
Last Answer : Wood without xylem vessels are called as – Soft wood
Description : Differentiate laticiferous vessels and cells.
Last Answer : Ans: laticiferous cell is smaller, less efficient and coenocyte. Laticiferous vessel is formed by the union of latex cells. It is more efficient and called as syncytium.
Description : Why are tracheids not efficient in transporting water up the plant? -Biology
Last Answer : answer:
Description : In germinating castor seed the RQ is (a) One (b) More than one (c) Less than one (d) Infinite
Last Answer : Ans. ((c))
Description : The closed circulatory system is more efficient. Since blood circulates only inside blood vessels it can do it with more pressure reaching farther distances between the organs where hematosis ... exchange independently from the circulation) are generally slower and have a low metabolic rate.
Last Answer : What is the difference between octopuses and mussels regarding their circulatory systems?
Description : Why are vessel elements better than tracheids? -Biology
Description : Function of tracheids -Biology
Description : What are tracheids?
Last Answer : Need answer
Description : The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of (a) weak gravitational pull (b) transpiration pull (c) lignified thick walls (d) cohesion and adhesion
Last Answer : (d) cohesion and adhesion.
Description : Transport of food material in higher plants takes place through (a) companion cells (b) transfusion tissue (c) tracheids (d) sieve elements.
Last Answer : (d) sieve elements.
Description : Gymnosperms are also called soft wood spermatophytes because they lack (a) cambium (b) phloem fibres (c) thick-walled tracheids(d) xylem fibres
Last Answer : (d) xylem fibres.
Description : Tracheids differ from other tracheary elements in (a) having Casparian strips (b) being imperforate (c) lacking nucleus (d) being lignified.
Last Answer : (b) being imperforate
Last Answer : d) sieve elements.
Description : Tracheids differ from other tracheary elements in (a) having Casparian strips (b) being imperforate (c) lacking nucleus (d) being lignified
Description : Conifers differ from grasses in the (a) formation of endosperm before fertilization (b) production of seeds from ovules (c) lack of xylem tracheids (d) absence of pollen tubes.
Last Answer : (a) formation of endosperm before fertilization
Description : Gymnosperms are also called soft wood spermatophytes because they lack (1) Xylem fibres (2) Cambium (3) Phloem fibres (4) Thick-walled tracheids
Last Answer : (4) Thick-walled tracheids
Description : Consider the following statements: The genetic code said to be degenerate and universal which means that, (1) Amino afids may have more than one codon (2) All amino acids have mo than one codon (3) Codons are common for higher and lower organism (4) Codons are not found in bacteria
Description : The hypogeal germination is found in: (a) Bean (b) Maize (c) Rhizophora (d) Cucurbita Ans. (b) Directions: In the following questions more than one answer given may be correct select the correct ... (1) Piper-Climbing root (2) Ficus-Climbing root (3) Buttress root-Bombax (4) Vitis-Nodulated root
Description : The shade of a tree is cooler than the shade of a roof due to: (a) Respiration (b) Photosynthesis (c) Transpiration (d) Guttation
Description : A substance unrelated to substrate but capable of reversibly changing activity of enzyme by binding to a site other than active site is called (a) Competitive inhibitor (b) Non-competitive inhibitor (c) Catalytic inhibitor (d) Allosteric modulator/inhibitor
Description : Decot root having more than six vascular bundles are found in (a) Pea (b) Sunflower (c) Ficus (d) Ranunculus
Description : When embryosac receives two or more than two pollen tubes the sperm nucleus fusing with the egg nucleus may be derived from one pollen tube and one fusing with the polar nuclei may be derived from other pollen tube, the phenomenon is termed as
Last Answer : When embryosac receives two or more than two pollen tubes the sperm nucleus fusing with the egg nucleus may be derived from one pollen tube and one fusing with the polar nuclei may be derived from other pollen tube, the phenomenon is termed as – Heterofertilization
Description : Who recognized the importance of floral characters in Taxonomy? Why are floral characters more useful than vegetative characters in classification?
Last Answer : Ans: Linnaeus. Floral characters show more variations and more stable than vegetative characters.
Description : Conduction band electrons have more mobility than holes because they (1) are lighter (2) experience collision less frequently (3) have negative charge (4) need less energy to move them
Last Answer : experience collision less frequently
Description : How do you care for an orchid?
Last Answer : I have two, and they require almost no care except water. It is the time of year they shed their blossoms so don’t worry. In the spring they will come right back.
Description : Where's can I buy one of those new "Jumbo" Venus Flytrap's?
Last Answer : You can buy them at The Little Shop of Horrors.
Description : What happens to a fully grown fruit tree if it is transplanted?
Last Answer : Fruit trees are so cheap…why not just plant a new one?
Description : What is the mechanism for motion in plants?
Last Answer : dude, I think this can be googled…. ;-P sorry if i sound like a smart alec….
Description : What is cookoo spit?
Last Answer : answer:You’re close. The guys inside the foam are called Spittle Bugs and there are 23,000 species of them More info
Description : What is Cerebellum ?
Last Answer : The segment on the opposite side of the pons is the cerebellum. It stays in a very buoyant state.
Description : Why do fruits fall prematurely ?
Last Answer : Hormone is the chemical substance that is produced in the cell and carried from the place of origin to control the functions of the cell at a distant place. Hormone deficiency causes various problems in ... of fruits. If the plant lacks a hormone called auxin, the fruit will fall off prematurely.
Description : What does tropic movement mean ?
Last Answer : Plants have the same sensory capacity as other organisms. Therefore, the stimulation that externally stimulates the plant body results in the movement and growth of the plant. These movements are called tropical movements. For example, the effect of light is to move towards the light of the stem.
Description : What is the role of auxin in plants ?
Last Answer : The role of auxin in plants is as follows : Prevents premature fall of fruit. Helps to produce seedless fruit. Auxin is also used for seed germination and weed control.
Description : Where is the lenticel located ?
Last Answer : Located on the lenticel stem.
Description : What is the name of the reproductive organ ?
Last Answer : Stolon is the name of the reproductive organ.
Description : What is the upper part of the embryonic root called ?
Last Answer : The upper part of the embryonic root is called the hypocotyl.
Description : What does Patal propagate through ?
Last Answer : Patal propagates through roots.
Description : What is the seed after fertilization ?
Last Answer : After fertilization, the egg becomes a seed.
Description : What happens after fertilization ?
Last Answer : After fertilization, the uterus becomes a result.