The pineapple which under natural conditions is difficult to blossom has been made to produce fruits throughout the year by application of
Options
(a) IAA, IBA (b) NAA, 2, 4-D (c) Phenyl acetic acid […]
The correct sequence of cell organelles during photorespiration is:
Options
(a) Chloroplast-Golgibodies-mitochondria (b) Chloroplast-Rough Endoplasmic reticulum, Dictyosomes (c) Chloroplast-peroxisome-mitochondria (d) Chloroplast-vacuole-peroxisome
Correct Answer:
Chloroplast-peroxisome-mitochondria
Explanation:
No explanation available. Be the first to write the […]
The c₄ plants are photosynthetically more efficient than C₃ plants because:
Options
(a) the CO₂ compensation point is more (b) CO₂ generated during photorespiration is trapped and recycled through PEP carboxylase (c) the CO₂ […]
Benthic organisms are affected most by
Options
(a) Water-holding capacity of soil (b) Light reaching the forest floor (c) Surface turbulence of water (d) Sediment characteristics of aquatic ecosystems
Correct Answer:
Sediment characteristics […]
The age pyramid with broad base indicates
Options
(a) High percentage of young individuals (b) High percentage of old individuals (c) Low percentage of young individuals (d) A stable population
Correct Answer:
High […]
What is true about the isolated small tribal populations?
Options
(a) There is a decline in population as boys marry girls only from their own tribe (b) Hereditary diseases like colour blindness do […]
Two plants can be conclusively said to belong to the same species if they
Options
(a) have more than 90 per cent similar genes (b) look similar and possess identical secondary metabolites (c) […]
Which one of the following statements is correct for secondary succession ?
Options
(a) It begins on a bare rock (b) It occurs on a deforested site (c) It follows primary succession (d) […]
The population of an insect species shows an explosive increase in numbers during rainy season followed by its disappearance at the end of the season. What does this show?
Options
(a) The food […]
In the case of peppered moth (Biston betularia) the black – coloured form became dominant over the light- coloured form in England during industrial revolution. This is an example of:
Options
(a) appearance […]
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