First organism evolved on earth were- (1) aerobic chemoheterotrophs (2) anaerobic chemoheterotrophs (3) aerobic autotrophs (4) anaerobic autotrophs The Primordial Earth and the Origin of Life Earth formed about 4.6 […]
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CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
When Did Angiosperms Originate? Tracing the Dawn of Flowering Plants
8. Angiosperms originated during (1) Upper cretaceous (2) mid cretaceous (3) Late cretaceous (4) Carboniferous Introduction Angiosperms, or flowering plants, are the most diverse and ecologically dominant group of land […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Why RNA Preceded DNA: Decoding the Evidence for the Ancient RNA World
The strongest evidence which suggest that RNA was ancient then DNA(1) RNA can act as template for DNA synthesis (2) RNA can work as catalyst (3) RNA is single stranded […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
What Caused the Extinction of Dinosaurs? The Meteorite Impact Theory
According to present concept the main cause of extinction of dinosaurs was (1) Competition (2) Meteorite striking (3) Unknown (4) Environment change Introduction The extinction of dinosaurs is one of […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
When Did the First Multicellular Eukaryotic Organisms Appear?
During evolution first multicellular eukaryotic organisms appeared (1) 1 billion years ago (2) 2 billions year ago (3) 600 millions year ago (4) 200 millions year ago Introduction The emergence […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Why Life Cannot Originate Today: The Role of Oxygen, Energy, and Materials in Earth’s Present Environment
Origin of life is not possible under present environmental conditions because- (1) Hydrogen is absent (2) Due to presence of oxygen (3) Lack of source of energy (4) Lack of […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Fossil Evidence and Ancient Landmasses: Brazil and Ghana’s Connection to Pangea
Recently reptile fossils of age 200-250 MY have been found in Brazil and Ghana-portion of West Africa. This suggest that the both places were part of large landmass during that […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Which Were the First Oxygen-Evolving Life Forms? Unveiling the Role of Cyanobacteria in Earth’s History
The first oxygen evolving forms among the following were- (1) Anaerobic autotrophs (2) Cyanobacteria (3) Protists (4) Algae The Early Earth: A World Without Oxygen For the first two billion […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Cenozoic Era: The Disappearance of Dinosaurs and the Rise of Mammals
Coenozoic era is characterized by- (1) Disappearance of reptiles and adaptive radiation in aves (2) Disappearance of Dinosours and adaptive radiation in aves (3) Disappearance of Dinosours and adaptive radiation […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Why Life Cannot Arise from Inorganic Molecules Today: The Role of Oxygen, Ozone, and Modern Earth Conditions
In Present condition origin of life from inorganic molecules is not possible because of- (1) Absence of raw material (2) Presence of molecular oxygen (3) Low enthalpy (4) Presence of […]
