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Darwinism explains all the following except:
Darwin judged the fitness of an individual by
Wings of pigeon, mosquito and bat show:
Wings of pigeon, moquito and bat perform same function(flying) but have evolved from separate ancestral populations. This similarity developed in distantly related groups as an adaptation for same function is called convergent evolution.
The abiogenesis occurred about how many billion years ago:
Abiogenesis or spontaneous creation or Autobiogenesis was proposed by Von Helmont (1577-1644) and state that life origniated abiogenetically from non living materials by spontaneous generation about 3.5 billion years ago.
One of the important consequences of geographical isolation is:
The extinct human who lived 1,00,000 to 40,000 years ago,in Europe, Asia and parts of Africa, With short stature,heavy eyebrows, retreating fore heads, large jaws with heavy teeth,stocky bodies, a lumbering gait and stooped posture was
What was the most significant trend in the evolution of modern man (Homo sapiens) from his ancestors ?
Evolution of different species in a given area starting from a point and spreading to other geographical areas is known as :
Process of evolution of different species in a given area starting from a point and radiating to other area of geographical areas is called adaptive radiations. Example : Darwin’s finches, Australian marsupials.
Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres)as envisaged in the biogenic origin of life?
Coacervate is an aggregate of macromolecules such as proteins, lipids and membrane and contain enzymes that are capable of converting such substance as glucose into more complex molecules, such as starch. Coacervate droplets arise spontaneously under appropriate conditions and may have been the prebiological systems from which living organisms originated.
Which one of the following pairs of items correctly belongs to the category of organs mentioned against it?
Nephridia of earthworm and malphigian tubules of cockroch belongs to excretory organs. Earthworm has a well developed excretory system which is composed of large number of minute, coiled and glandular segmentally arranged excretory tubules called the nephridia. Malphigian tubules of cockroach are extremely fine yellowish unbranched thread like structure present at the function of midgut and hindgut.