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
A.
gymnosperms are dominant plants and first birds appear
Jurassic period is the second geological period of Mesozoic era. In this period, the gymnosperms were dominant and the plants included ferns, cycads, Ginkgo, rushes and conifers. Among animals, important invertebrates included ammonites, corals, brachiopods, bivalves and echinoids. Reptiles dominated the vertebrates and the first flying reptiles the pterosaurs appeared.
The first primitive bird, Archaeopteryx, also made its appearance.
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
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
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
Which of the following is considered a hot-spot of biodiversity in India?
Western ghats
Indo-Gangetic plain
Eastern ghats
Eastern ghats
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
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
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
