If the energy of electron in H atom is given by expression, − 1312/n² kJ mol^-1, then the energy required to excite the electron from ground state to second orbit is

#Question id: 11050

#XL - R Botany

Three dimensional reconstructions of Arabidopsis sieve plates using a staining technique that can be used to image entire plant organs and Open sieve pores are visible as well as callose plug are also visible which technique used to analyze

#Question id: 1760

#XL - Q Biochemistry

Effector memory T-cells can be distinguished from the central memory T-cells from which they arise by:

#Question id: 19769

#XL - P Chemistry

#Question id: 5761

#XL - S Microbiology

E. coli cells were spread on an agar plate, producing 1000 colonies.  The colonies are replica plated on two agar plates containing the antibiotic kanamycin and one agar plate without antibiotics.  All of the colonies are able to grow on the agar plate without antibiotic but only 4 colonies are able to grow on each of the agar plates containing kanamycin.  You notice that the four colonies that grew on each of the kanamycin containing plates are in the exact same position.  This demonstrates

#Question id: 4610

#XL - T Zoology

It has been observed that organisms on islands are different from, but closely related to, similar forms found on the nearest continent. This is taken as evidence that ________.