An important evidence in favour of organic evolution is the occurrence of
homologous and vestigial organs
analogous and vestigial organs
homologous organs only
homologous organs only
A.
homologous and vestigial organs
An important evidence in favour of organic evolution is the occurrence of homologous and vestigial organs. Homologous organs are those which have the common origin and are built on the same fundamental pattern but they perform different functions and have different appearances e.g., whale's flipper, bat's wings, cat's paw, horse's front leg, bird's wing, ox's front leg and human hand.
Vestigial organs in animals are those having no function now, in them, but had important functions in their ancestors.
Analogous organs are quite different in fundamental structure and embryonic origin but perform the same function. The study of analogous organs illustrates the occurrence of convergent evolution.
Which one of the following is the correctly matched pair of an endangered animal and a National Park?
Lion — Corbett National Park
Rhinoceros — Kaziranga National Park
Wild ass — Dudhwa National Park
Wild ass — Dudhwa National Park
Which of the following is considered a hot-spot of biodiversity in India?
Western ghats
Indo-Gangetic plain
Eastern ghats
Eastern ghats
Microbes found to be very useful in genetic engineering are
Escherichia coli and Agrobacterium tumefaciens
Vibrio cholerae and a tailed bacteriophage
Diplococcus sp. and Pseudomonas sp
Diplococcus sp. and Pseudomonas sp
A person showing unpredictable moods, outbursts of emotion, quarrelsome behaviour and conflicts with others is suffering from
schizophrenia
borderline personality disorder (BPD)
mood disorders
mood disorders
Which one of the following is not a living fossil?
King crab
Sphenodon
Archaeopteryx
Archaeopteryx
Annual migration does not occur in the case of
salmon
siberian crane
salamander
salamander
Which of the following pairs of an animal and a plant represents endangered organisms in India?
Bentinckia nicobarica and red panda
Tamarind and rhesus monkey
Curing of tea leaves is brought about by the activity of
bacteria
mycorrhiza
viruses
viruses
Jurassic period of the Mesozoic era is characterised by
gymnosperms are dominant plants and first birds appear
radiation of reptiles and origin of mammal like reptiles
dinosaurs become extinct and angiosperms appear
dinosaurs become extinct and angiosperms appear
