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LOCOMOTION IN EARTHWORM -
By contrection & relaxation of muscles waves are formed in body, generally from posterior to anterior.
Setae are helpfull in locomotion. Rate of locomotion 25 cm / minute.
Under control of nerve cord, explained by Grey & Leismann.
Q. What are the three fundamental sexual life cycles studied in Biology? Which of them corresponds to metagenesis? Which of them is the human life cycle? Sexual reproduction ma
describe an operon
Phylum Zooflagellata (Animal Flagellates) 1) At some stage of life-cycle they have one or more flagella. 2) They feed heterotrophically by absorption or phagocytosis, and
Determine about the Secondary minerals Secondary minerals are formed under conditions of temperature and pressure found at the Earth's surface by the weathering of pre-existi
What are peristaltic movements? What is their role in human digestion? Peristalsis is the process of synchronized contractions of the muscular wall of the digestive tube. Peris
Physiological Changes - Consequences of Aging Various physiological regulatory mechanisms show decreased efficiency due to aging. For instance, normally the glucose level in t
What is allele frequency? The Allele frequency is the percentage of appearances of an allele in the genotypes of a given population (compared to the other alleles of the studie
Q. Why does thymine replace uracil in DNA? The difference between DNA and RNA is existence of a hydroxyl (-OH) group on 2' carbon of the ribose sugar in the backbone. Removal o
what are the role of microbes in human welfare
what are the ecological importance of molluscus
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