Last seen: Jan 13, 2022
(d) If both the Assertion and Reason are incorrect. Explanation: Xylem is the water conducting tissue. It consists of living cells like parenchyma...
Correct option: (b) Explanation: During epigeal germination, cotyledons come out of the soil. The green cotyledons function as leaves of the seedl...
(e) If the Assertion is incorrect but the Reason is correct. Explanation: Collenchyma is made up of living cells with unevenly thickened cell wall...
(d) If both the Assertion and Reason are incorrect. Explanation: Collateral vascular bundles have the xylem pointing towards the inner side of the...
Correct option: (a) Explanation: The root apex and shoot apex are meristematic in nature. These meristematic tissues are embryonic in origin. They...
Correct option: (b) Explanation: Fusiform initials are vertically elongated cells that produce xylem and phloem elements. Ray initials are isodiam...
(e) If the Assertion is incorrect but the Reason is correct. Explanation: Plant cuticles are a protective waxy covering produced only by the epide...
(a) centre; periphery Explanation: The first formed primary xylem elements are called protoxylem and the later formed primary xylem is called meta...
(c) Lateral meristem
(b) Only (i), (ii) and (iii)
(d) dead, without Explanation: Sclerenchyma consists of long, narrow cells with thick and lignified cell walls having a few or numerous pits. They...
(a) Root dies first Explanation: If a stem is girdled, root dies first, as the food synthesized by leaves is not able to reach to the roots.
(d) endarch condition of stem and exarch condition of root Explanation: The cross sections of stem and root appear simple, when viewed by naked ey...
(a) Deposition of callose on sieve plates. Explanation: In the sieve elements, P-proteins deposit callose on sieve plates.
(b) cambium for secondary growth Explanation: Grafting is a horticultural technique whereby tissues from one plants are inserted into those of ano...
(b) Endosperm of castor Explanation: Glyoxysomes are found in the plant cells particularly in the cells of germinating fatty seeds, e.g. endosperm...
(c) Sieve tube elements possess cytoplasm but no nuclei. Explanation: Sieve tube elements possess cytoplasm but lack nucleus at maturity. Its meta...
(b) suberin Explanation: Phellogen produces cork or phellem on the outer side. It consists of dead and compactly arranged rectangular cells that p...
(c) sieve elements Explanation: Companion cells are long elongated living cells, that lie on the sides of the sieve tubes in phloem. Companion cel...