JAM Question Paper 2009 BT (Biotechnology).
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JAM Question Paper 2009 BT (Biotechnology)
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When cultured in vitro with a suitable combination of growth regulators, plant parenchyma and collenchyma cells become meristematic. This phenomenon 18 called
(A) differentiation (B) maturation
(C) apoptosis (D) dedifferentiation
Which one of the following statements about neve tube elements in plants is NOT COR RECT?
(A) They are supported by companion cells
(B) They must die to become functional
(C) They link end to end forming sieve tubes
(D) They translocate organic nutrients
(A) a type of phylogenetic tree
(B) a group of evolutionarily related species sharing a common ancestor
(C) an extinct species
(D) a tool for constructing a phylogenetic tree
Kupifer cells are found in
(A) stomach (B) liver
(C) small intestine (1)) large intestine
Ecological succession refers to
(A) changes in community composition after a disturbance
(B) the process by which a species become abundant
(C) the building of soil nutrients
(D) changes in a forest as trees grow taller