Multiple Choice QuestionsThe important gas which was absent during the formation of Earth is
oxygen
hydrogen
nitrogen
carbon dioxide
In spermatogenesis, reduction division of chromosome occurs during conversion of
spermatogonia to primary spermatocytes
primary spermatocytes to secondary spermatocytes
secondary spermatocytes to spermatids
spermatids to sperms
The carcinoma, a type of cancer, originates from
blood
connective tissue
epithelial tissue
lymph gland
Homo erectus evolved during
Oligocene
Pliocene
Pleistocene
Miocene
C.
Pleistocene
Homo erectus lived from the end of Pliocene epoch to the later Pleistocene about 1.3 to 1.8 million years ago. This species originated in Africa and spread as far as India, China and Java. It walked erect over long legs, height 1.5 - 1.79 mt, brain size (cranial capacity) 775 - 1225 cm, prognathus face with prominent brow ridges, no chin, massive jaws and larger teeth. Use of tools made up of bones and stones, fire, acheulean hand axes and some primitive type of speech had developed.
Which one of the following is not included under in situ conservation?
National park
Wild life sanctuary
Zoological garden
Biosphere reserve
Melting of DNA at an elevated temperature (70°C) is primarily due to the breakdown of
phosphodiester bonds
glycosidic bonds
disulphide bonds
hydrogen bonds
The usual source of restriction endonucleases used in gene cloning is from
fungi
bacteria
plants
viruses
For a clean environment, which one following is not essential?
Producer
Consumer
Decomposer
Polluter
The expanded name of MRI is
Medical Reserach Instrument
Magnetic Resonance Imaging
Magnetic Research Institute
Medical Resonance Imaging
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