Which of the following gases provided the carbon skeleton of living things during the origin of life?
Solar system originated from Solar Nebula--- billion years ago
Who have a perfect pair of sex chromosomes?
Which one is a possible progeny in F2 generation of pure bred tall plant with round seed and short plant with wrinkled seeds?
The theory of spontaneous generation stated that:
Answer: life can arise from non-living things only.
The bones of forelimbs of whale, bat, cheetah and man are similar in structure, because:
Answer: they share a common ancestor
Viviparity is considered to be more evolved because:
Answer: the young ones are protected inside the mother’s body and are looked after
they are born leading to more chances of survival
The approximate time when life originated dates back to
Answer: 3000-4000 million years
The first anaerobic photoautotrophs originated--- million years ago
Life originated about 3.6 billion years ago in the
Which of the following is not a direct conclusion that can be drawn from Mendelï¿½s Experiment?
Answer: Natural selection can alter frequency of an inherited trait.
With whom you can associate theory of evolution?
Angiosperms (Flowering plants) originated in
Answer: Cretaceous period
Protenoid microspheres could produce an isolating membrane if---- is added to the aqueous solution:
The most accepted line of descent in human evolution is:
Answer: Ramapithecus → Homo habilis → Homo erectus → Homo sapiens