Last seen: Jan 13, 2022
(d) lenticels Explanation: During secondary growth, where epidermis is replaced by tough and hard periderm, the cracked/ruptured epidermis forms t...
(c) reserve for replenishment of damaged cells of the meristem. Explanation: The concept of Quiescent Centre was proposed by Clowes in 1961. On th...
(c) phellem-endodermis-pericycle-phloem Explanation: In a dicotyledonous stem, the sequence of tissues from outside to the inside is phellem-endod...
(c) dorsiventral leaf Explanation: In a dorsiventral leaf, mesophyll is differentiated into two layers i.e. palisade parenchyma and spongy parench...
(b) dicot stem Explanation: In dicot stem, fascicular cambium and interfascicular cambium join to form a complete ring which helps in secondary gr...
(a) endodermis Explanation: Passage cells are found in endodermis which allow a limited transfer of materials between the cortex and the vascular ...
(a) vessels Explanation: Porous wood contains vessels, with sieve cells, which contains passages for movement of substances.
(d) Sieve tube cell Explanation: Sieve tube cell is enucleate at maturity due to the degeneration of its nucleus during its developmental process....
(d) secondary meristem Explanation: The cambium is secondary in its functional aspect since it forms secondary tissues like the secondary xylem an...
(b) pericycle Explanation: The lateral roots arise from the cell of pericycle and hence, the root branches are said to be endogenous in origin (ar...
(a) cortex Explanation: Endodermis is the inner most layer of cortex. The cells are characterized by the presence of casparian strips.
(a) lateral meristem Explanation: Cork cambium (phellogen) is a secondary lateral meristem which develops from permanent tissues in the region of ...
(a) parenchyma Explanation: Aerenchyma is the modification of parenchyma tissue in which cells are arranged in such a way that - large air filled ...
(b) manoxylic wood Explanation: Cycas stem shows monoxylic wood with broad parenchymatous rays and often contain abundant resinous cells and resin...
Correct option:(b) Explanation: A leaf having a single or undivided lamina is called simple leaf, the lamina can have different types of incisions...
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect. Explanation: In fabaceae, ovary is present. Placentation is marginal with many ovules.
Correct option: 1. Adani
Correct option: 19 August
Correct option: 4. Mali