1. Which of the following monocots does not exhibit secondary growth
(a) Dracaena (b) Agave (c) Aloe (d) Maize
2. The amount of secondary xylem produced during secondary growth is more as compared to the secondary phloem produce because
(a) the cambium activity is more towards outer side
(b) the cambium activity is more towards inner side
(c) the cambium is more active on both sides but xylem is needed more
(d) cambium does not play any significant role in this.
3. As secondary growth proceeds, in a dicot stem, the thickness of
(a) sapwood increases
(b) heartwood increases
(c) both sapwood and heartwood increase equally
(d) both sapwood and heartwood remains the same.
4. The heartwood is said to be resistant to microbial attack because
(a) it has tyloses in its vessels
(b) it is used for conduction of mineral salts which get accumulated and make it more resistant
(c) it has lignified cells that are filled with oil, resins, gums, tannins etc.
(d) none of these.
5. Softwood is different to hardwood in various aspects, except (a) it is rich in tracheid content i.e., about 90 95%.
(b) it devoid of vessels.
(c) it is found in gymnosperms.
(d) it has abundant fibers i.e., about 60-70%.
6.Medullary bundles, i.e., the vascular bundles present in pith are not commonly seen in
(a) Amaranthus (b) Adryrantfms (c) Bougauwillea ((1) Beta vulgaris.
7. lnterfascicular cambium arises from
(a) ptocambium (b) medullaryrays (c) fusiforminitials (d) rayinitials
8. Secondary growth is also seen in roots but the toots do not show annual rings as stem do. It is because
(a) the roots grow in soil environment which remain same
(b) cambium activity is not seen
(c) these do not have secondary xylem
(d) these do not grow in light.
9. Anomalous secondary growth can be a tesult of
(a) abnmmal behaviom of normal (ambium
(b) formation of interxylary phloem
(c) formation of accessory cambium rings
(d) all of these.
10. Tyloses are
(a) structures originating in lumen of vessels
(b) characteristic featme of sapwood
(c) extension of xylem parenchyma into vessels
(d) special lignified structures that help in lateral conductionof mineral salt:
12. Anomalous vascular bundles occur in cortex found in
(a) Dracoena (b) Nycranthx (c) Boemaavia (d) Bela vulgaris.
13. Plants having little at no secondary growth are
(a) grasses (b) deciduous angiospetms (c) conifers (d) cycads.
14. The activity of cambium is mom in spring results in
(a) ptoduction of larger wood elements with wide lumen
(b) ptoduction of smaller wood elements with nanow lumen
(c) similar type of wood elements
(d) production of larger wood elements with narrow lumen.
15. Phellogen cuts off (_i)_ on outside and ii) on
(a) (i) phellem (ii) phelloderm
(b) (i) phelloderm (ii) phellem
(c) (i) secondary cortex (ii) cork cells
(d) (i) phellem (ii) cork cells
16.Secondary xylem and phloem in dicot stem are produced by
(a) apical meristems
(b) vascular cambium
(c) phellogen
(d) axillary meristems.
17.The brown colour of phellem in due to the presence of
(a) abundant tannins
(b) dead cells
(c) suberised walls
(d) brown pigment.
18.The visible anatomical difference between the primary xylem and secondary xylem includes
(a) plimary xylem forms a cylinder while secondary xylem occurs in patches
(b) central position of secondary xylem whereas peripheral position of primary xylem
(c) long and thin vessel in primary xylem and short and thick vessels in secondary xylem
(d) none of these.
19. Read the following sentences and select the incorrect one.
(a) Ring porous wood is found in Dalbergia sisoo, however diffuse porous wood is found in Syzygium cumini.
(b) In diffuse porous wood, large sized vessels are found in autumn wood and small sized vessels are found in winter wood.
(c) Many textile fibers of commercial value as jute, hemp, etc. are the best fibers of secondary phloem.
(d) Fusiform initials form axial system of secondary vascular tissue.
20.Which of the statements given below is not true about formation of annual rings in trees?
(a) Annual rings are not prominent in trees of temperate region.
(b) Annual ring is a combination of spring wood and autumn wood produced in a year.
(c) Differential activity of cambium causes light and dark bands of tissue-early and late wood respectively.
(d) Activity of cambium depends upon variation in climate.
21. Hamburger’s phenomenon explains
(a) formation of HCO}
(b) chloride shift
(c) oxygen saturation of haemoglobin
(d) breathing mechanism.
22. Inspiration occurs when there is a negative pressure in the lungs with respect to atmospheric pressure. This negative pressure is achieved when
(a) intrapulmonary pressure is less than the atmospheric pressure
(b) intrapulmonary pressure is greater atmospheric pressure
(c) intrapulmonary pressure is equal to the atmospheric pressure
(d) intrapleural pressure becomes more than the intra aiveoiar
23. Which of the following has the highest pH?
(a) Gastricjuice (b) Hepatic bile (c) Saliva (d) Secretion of the intestinal glands
24. Which of the following hormones influence the process of digestion?
(i) Secretin (ii) Ptyalin (iii) Cholecystokinin (iv) Enterogastrone (v) Somatostatin
(a) (i), (ii) and (iii)
(b) (i), (iii) and (iv)
(c) (iii), (iv) and (v)
(d) (i), (iii), (iv) and (v)
25. A flap like structure which checks the entry of food into opening of windpipe is
(a) glottis (b) epiglottis (c) Adam’s apple (d) hyoid bone.
(a) Dracaena (b) Agave (c) Aloe (d) Maize
2. The amount of secondary xylem produced during secondary growth is more as compared to the secondary phloem produce because
(a) the cambium activity is more towards outer side
(b) the cambium activity is more towards inner side
(c) the cambium is more active on both sides but xylem is needed more
(d) cambium does not play any significant role in this.
3. As secondary growth proceeds, in a dicot stem, the thickness of
(a) sapwood increases
(b) heartwood increases
(c) both sapwood and heartwood increase equally
(d) both sapwood and heartwood remains the same.
4. The heartwood is said to be resistant to microbial attack because
(a) it has tyloses in its vessels
(b) it is used for conduction of mineral salts which get accumulated and make it more resistant
(c) it has lignified cells that are filled with oil, resins, gums, tannins etc.
(d) none of these.
5. Softwood is different to hardwood in various aspects, except (a) it is rich in tracheid content i.e., about 90 95%.
(b) it devoid of vessels.
(c) it is found in gymnosperms.
(d) it has abundant fibers i.e., about 60-70%.
6.Medullary bundles, i.e., the vascular bundles present in pith are not commonly seen in
(a) Amaranthus (b) Adryrantfms (c) Bougauwillea ((1) Beta vulgaris.
7. lnterfascicular cambium arises from
(a) ptocambium (b) medullaryrays (c) fusiforminitials (d) rayinitials
8. Secondary growth is also seen in roots but the toots do not show annual rings as stem do. It is because
(a) the roots grow in soil environment which remain same
(b) cambium activity is not seen
(c) these do not have secondary xylem
(d) these do not grow in light.
9. Anomalous secondary growth can be a tesult of
(a) abnmmal behaviom of normal (ambium
(b) formation of interxylary phloem
(c) formation of accessory cambium rings
(d) all of these.
10. Tyloses are
(a) structures originating in lumen of vessels
(b) characteristic featme of sapwood
(c) extension of xylem parenchyma into vessels
(d) special lignified structures that help in lateral conductionof mineral salt:
12. Anomalous vascular bundles occur in cortex found in
(a) Dracoena (b) Nycranthx (c) Boemaavia (d) Bela vulgaris.
13. Plants having little at no secondary growth are
(a) grasses (b) deciduous angiospetms (c) conifers (d) cycads.
14. The activity of cambium is mom in spring results in
(a) ptoduction of larger wood elements with wide lumen
(b) ptoduction of smaller wood elements with nanow lumen
(c) similar type of wood elements
(d) production of larger wood elements with narrow lumen.
15. Phellogen cuts off (_i)_ on outside and ii) on
(a) (i) phellem (ii) phelloderm
(b) (i) phelloderm (ii) phellem
(c) (i) secondary cortex (ii) cork cells
(d) (i) phellem (ii) cork cells
16.Secondary xylem and phloem in dicot stem are produced by
(a) apical meristems
(b) vascular cambium
(c) phellogen
(d) axillary meristems.
17.The brown colour of phellem in due to the presence of
(a) abundant tannins
(b) dead cells
(c) suberised walls
(d) brown pigment.
18.The visible anatomical difference between the primary xylem and secondary xylem includes
(a) plimary xylem forms a cylinder while secondary xylem occurs in patches
(b) central position of secondary xylem whereas peripheral position of primary xylem
(c) long and thin vessel in primary xylem and short and thick vessels in secondary xylem
(d) none of these.
19. Read the following sentences and select the incorrect one.
(a) Ring porous wood is found in Dalbergia sisoo, however diffuse porous wood is found in Syzygium cumini.
(b) In diffuse porous wood, large sized vessels are found in autumn wood and small sized vessels are found in winter wood.
(c) Many textile fibers of commercial value as jute, hemp, etc. are the best fibers of secondary phloem.
(d) Fusiform initials form axial system of secondary vascular tissue.
20.Which of the statements given below is not true about formation of annual rings in trees?
(a) Annual rings are not prominent in trees of temperate region.
(b) Annual ring is a combination of spring wood and autumn wood produced in a year.
(c) Differential activity of cambium causes light and dark bands of tissue-early and late wood respectively.
(d) Activity of cambium depends upon variation in climate.
21. Hamburger’s phenomenon explains
(a) formation of HCO}
(b) chloride shift
(c) oxygen saturation of haemoglobin
(d) breathing mechanism.
22. Inspiration occurs when there is a negative pressure in the lungs with respect to atmospheric pressure. This negative pressure is achieved when
(a) intrapulmonary pressure is less than the atmospheric pressure
(b) intrapulmonary pressure is greater atmospheric pressure
(c) intrapulmonary pressure is equal to the atmospheric pressure
(d) intrapleural pressure becomes more than the intra aiveoiar
23. Which of the following has the highest pH?
(a) Gastricjuice (b) Hepatic bile (c) Saliva (d) Secretion of the intestinal glands
24. Which of the following hormones influence the process of digestion?
(i) Secretin (ii) Ptyalin (iii) Cholecystokinin (iv) Enterogastrone (v) Somatostatin
(a) (i), (ii) and (iii)
(b) (i), (iii) and (iv)
(c) (iii), (iv) and (v)
(d) (i), (iii), (iv) and (v)
25. A flap like structure which checks the entry of food into opening of windpipe is
(a) glottis (b) epiglottis (c) Adam’s apple (d) hyoid bone.