Multiple Choice QuestionsAbundance of a species in a population, within habitat is called
niche density
absolute density
relative density
geographic density
A.
niche density
Niche density is the abundance of a species in a particular population within its habitat.
Absolute density is the number of organisms per unit area or volume.
Relative density is the density of one species as a percent of total plant density.
Which of the following plants are used as green manure in crop fields and in sandy soils?
Saccharum munja and Lantana camara
Dichanthium annulatum and Azolla nilotica
Crotalaria juncea and Alhagi camelorum
Calotropis procera and Phyllanthus niruri
In a flowering plant, archesporium gives rise to
wall and tapetum
only tapetum and sporogenous cells
only wall of the sporangium
both wall and sporogenous cells
During translation initiation in prokaryotes, a GTP molecule is needed in
association of 30S, mRNA with formyl-met-tRNA
association of 50S subunit of ribosome with initiation complex
formation of formyl-met-tRNA
binding of 30S subunit of ribosome with mRNA
In the genetic code dictionary, how many codons are used to code for all the 20 essential amino acids?
61
60
20
64
Which one of the following bacteria has found extensive use in genetic engineering work in plants?
Bacillus coagulens
Agrobacterium tumefaciens
Bacillus subtilis
E. coli
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