Which of the following is an example of numerical change in chromosome number?
Parkinson's disease Xeroderma pigmentosum Progeria syndrome Down's syndrome
Chlorophyll is an effective photoreceptor pigment. This property of chlorophyll is due to ________.
Nitrogen in chlorophyll Presence of accessory pigment Magnesium in chlorophyll Presence of polyene structure
Febries are what kind of cells ?
Sclerenchymatous Parenchymatous Chloroplast Collenchymatous
Polypeptides can be fragmented by using chemical treatment before amino acid sequencing of a given protein. Cyanogen bromide is one such reagent and its specific cleavage site is ________.
Carboxyl side of ‘arginine residues’ Carboxyl side of aspartate and glutamate residues Carboxyl side of lysine and arginine residues Carboxyl side of methionine residues
During a growth curve of Aliivibrio fischeri, when would you expect to see the strongest bioluminescence?
Lag phase Middle to late stationary phase Early to middle log phase Late log to early stationary phase
Maximum biodiversity occurs at ___________.
Equator Temperate Shooth Tropics
Deepest enriched soil with nutrients is present at _____________.
Grasslands Dry deciduous forests Conifers Tropical rain forests
Each organism occupies a particular trophical level in a food chain. Moving from one trophical level to the next involves an energy loss of about ___________.
20% 10% 30% 12%
Benthic organism of lakes or sea are usually ______.
Carnivores Decomposers Herbivores Producer
Profitability of prey for predator lies in its energy content and ______________.
Prey density Foraging time prey availability Palatability
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