Q. No.Evolutionary history of an organism is known as
1. Phylogeny
2. Ancestry
3. Paleontology
4. Ontogeny
1. Phylogeny
2. Ancestry
3. Paleontology
4. Ontogeny
Jurassic period of the Mesozoic era is characterized by
1. Gymnosperms are dominant plants and first birds appears.
2. Radiation of reptiles and origin of mammal like reptiles.
3. Dinosaurs become extinct and angiosperms appears.
4. Flowering plants and first dinosaurs appear.
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Adaptive radiations refers to
1. Power of adaptation in an individual to a variety of environments.
2. Adaptations due to geographical isolation.
3. Evolution of different species from a common ancestor.
4. Migration of members of a species to different geographical areas.
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Amongst the human ancestors the brain size was more than 1000 cc in
1. Homo habilis
2. Homo neanderthalensis
3. Homo erectus
4. Ramapithecus
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Which one of the following pairs of items correctly belongs to the category of organs mentioned against it?
1. Wings of honey bee and wings of crow - Homologous organs
2. Thorn of Bougainvillea and tendrils of Cucurbita - Analogous organs
3. Nictitating membrane and blind spot in human eye - Vestigial organs
4. Nephridia of earthworm and Malpighian tubules of cockroach - Excretory organs
Which one of the following scientists' names is correctly matched with the theory put forth by him?
1. Mendel - Theory of Pangenesis
2. Weismann - Theory of continuity of germplasm
3. Pasteur - Inheritance of acquired characters
4. De Vries - Natural selection
What is the most significant trend in the evolution of modern man (Homo sapiens) from the ancestors?
1. Increasing cranial capacity
2. Upright posture
3. Shortening of jaws
4. Binocular vision
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Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as
1. Genetic flow
2. Genetic drift
3. Random mating
4. Genetic load
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The tendency of population to remain in genetic equilibrium may be disturbed by
1. Random mating
2. Lack of migration
3. Lack of mutations
4. Lack of random mating
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Which is the most common mechanism of genetic variation in the population of a sexually reproduction organism?
1. Transduction
2. Chromosomal aberrations
3. Genetic drift
4. Recombination
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