Stellar distances are measured in
Light years
Age of universe?
20 billion years old
Big bang theory explains
Origin of universe
The gases condensed under which conditions to form the galaxies
Gravitation
Age of earth
4.5 billion years ago
Was there anyy atmosphere on early earth?
Noo
When did life appear on Earth?
4 bya .. 500 million years after formation of earth
Who proposed that the first form of life could have come from pre existing non living organic molecules?( Rna proteins)
Oparin of Russia
Haldane of England
(HERO)
formation of life was preceded by chemical evolution.
Who and when did he create the similiar condition as on early earth.. wat did he observe?
1953 SL Miller.. an American scientist.
Closed flask..
800°C
Observation - formation of amino acids
Firs non cellular life form when?
3 bya..
First cellular life form
2 bya.. single cell
Name of sail ship of Charles Darwin
HMS Beagle
Who came to the similiar idea about natural selection and fitness as Charles Darwin
Alfred Wallace a naturalist
Malay archipelago
T/F
All the existing life forms share similaritiesss and share common ancestor
TRUE
Embryological support for evolution was proposed by? And disproved by?
Ernst Heckel… proposed
Disproposed by.. karl ernst von baer
.. said ki.. embryos never paass through rhe adult stage of other animals
Wat is homology and example?
Homology indicates common ancestary..
Similar anatomical structure
Divergent evolution
Ex-
Forelimbs of all mammals..
Vertebrate heart or brains.
Thorn of Bougainvillea and tendrils of cucurbita
Wat are analogous structures
Convergent evolution
Same function differ in anatomy
Ex-
Wings of birds and butterflies
Eye of octopus and mammals
Flippers of penguin and dolphin
Sweet potato (root modification) and potato (stem modification)
White coloured lichen grow in?
Before industrialisation.. in
Lichens do. Not grow in areas that are polluted
Is evolution a directional process?
No.. it is a stochastic process based on chance events in nature and chance mutation in the organism
Who were probably the most recent common ancestors of modern day frogs and salamander
Lobefinned fishes
All bryophytes and tracheophytes have originated from
Chlorophyte ancestor
Which is a fish like reptile
Icthyosaur
Lobefins which evolved into first amphibian were
Coelacanths
Which is the largest diverse group/ unit that can show gene flow
Population
