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Gill slits are the opening or the clefts between the gill arches in the fish. Water taken in by the mouth passes through the gill slits and bathes the gills. It also has rudimentary grooves in the neck area of embryos of air-breathing vertebrates such as humans; a characteristic of chordates.
Liverworts and mosses are characterized by their lack of vascular conducting tissue. These two groups of liverwort, plants and mosses, are known by which of the below terms: a)
EMERGENC E OF CONTEMPORARY BIOLOGY - 1 . Aristotle (384-322BC) - Greek Classified animal species and arranged them in hierarchies. Formulated 'Great chain of
What are the three main steps for a good study of a genetic family tree? Step 1: to determine whether the studied phenotypical form has a dominant or recessive pattern. Step
General characters of mollusca
The effect of natural selection on colonies or population favouring one group in preference to other may be referred to as group selection. A group can be the smallest collection o
Definition and applications
Hydrogen bonds are important for all of the following except:: a) Allowing carbohydrates to dissolve in water b) Stabilizing the three-dimensional shape of proteins. c) Ma
Radioactive pollution is a very special form of pollution of air, water and soil with radioactive material. Its nature of contamination and effects are different from those of othe
Fusion of Sperm and the Egg After the penetration of the extracellular layers by sperm there occurs the fusion of the - sperm plasma membrane with that of the egg. In mammals
Q. What is self-catalytic RNAs? Ribozymes - Term 'ribozyme' was initially suggested by Thomas R. Cech, Nobel Prize winning biochemist, who discovered this class of RNA molecul
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