For origin of life, which of the following is not a precondition, needed to be fullfilled by the protobionts under consideration ?
1. They should have been able to totally isolate themselve from the general environment
2. They should have been able to replicate
3. They should have acquired a perpetual source of energy
4. Their replication should have been subject to error via mutation
Adenine was synthesized by Orgel, using the Miller apparatus, when he used the gas:
1. carbon dioxide
2. hydrogen cyanide
3. hydrogen sulfide
4. nitrogen
The control apparatus of the Urey and Miller experiment was devoid of:
1. a provision for evaporation
2. an arrangement for circulation
3. a source of energy
4. an arrangement for condensation
The formation of a new species through change in a single lineage is known as:
(1) Anagenesis, or phyletic evolution
(2) Cladogenesis, or divergent evolution
(3) Convergent evolution
(4) Allopatry
For the stability of the organic compounds, Oparin opined that probably:
1. UV radiation never reached the surface of the primeval Earth
2. the primeval Earth was in a molten state
3. the primeval Earth atmosphere was reducing rather than oxidizing
4. plenty of energy sources were available for chemical reactions to occur
Which of the following organisms alive today is likely to be most similar to the first life forms that evolved on the earth?
1. Methane producing bacteria
2. Cyanobacteria
3. Unicellular algae
4. Diatoms
The similarities between the eyes of an octopus and of a mammal are a result of:
1. Convergent evolution
2. Divergent evolution
3. Saltation
4. Retrograde evolution
Which of the following would lead to deviation from Hardy-Weinberg equilibrium?
1. Random mating
2. Lack of mutations
3. No gene flow or gene migration
4. Natural selection
The now extinct reptile group that evolved into mammals was:
1. Therapsids
2. Dinosaurs
3. Thecodants
4. Sauropsids
Identify the correct statement:
1. Dryopithecus was more man like than Ramapithecus
2. Homo Habilis probably did not eat meat
3. Homo Erectus had a cranial capacity of around 800 cc
4. Agriculture came around 18000 years ago