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Do sea urchins have teeth?
Sea urchins have a teeth-like structure juxtaposed to the mouth and made of five teeth linked to ossicles and muscle fibers. This structure, called as Aristotle's lantern, is use to scratch food, mainly algae, from marine rocks.
REPRODUCTIO N - It is not only production of new ones to increases its number but a means for the survival of a population on earth. Main aim is "survival and continuati
Explain the Nonpolar Molecular Attractions in basic chemistry? Nonpolar Molecular Attractions : Van der Waals forces and hydrophobic interactions are weak (not as strong
Explain Proteins as carriers? A large variety of compounds are carried in the blood between tissues and organs of the body. Some of the compounds require specific protein for t
Hydrarch - Ecology Its various stages are well studied in ecosystem like ponds, pools and lakes. Since pond is a fresh water ecosystem, the succession in it is also referred t
explain about vascular system
Young's Trichromatic Theory According to Young's theory, three types of cones exist, each sensitive to a particular pigment-rythrolabe (red), chlorolabe (green), and cyanolabe
Explain in 100+ words Why/how did molecular biology change forsenic biology.
Q. Phylogenetic systems of classification? As already pointed out 'earlier that in Phylogenetic system, the plants are classified according to their evolutionary relationships.
Marine Animals The composition of body fluids of marine invertebrates, including the ascidians are similar to seawater. Such animals need not expend much energy in regulating
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
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