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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.
What is photoperiodism? Photoperiodism is the biological response shown by some living beings to their daily time of light exposure (photoperiod).
A complete motor neuron is removed from a frog and placed in a large volume of normal physiological saline. The neuron is healthy; it has a stable resting voltage of -70 mill
What is biological control? Biological control is a natural process to control the size of animal, microorganism or plant populations. Biological control is based on the knowle
What are histogenesis and organogenesis? Histogenesis is the procedure of tissue formation in the embryonic development. Organogenesis is the process of organ formation. Before
In the eukaryotes replication of chromosomal DNA happens only in the S phase of the cell cycle. As for bacterial DNA, eukaryotic DNA is replicated figure: The euk
S p e c i a l Uses Biogas Biogas is an important renewable energy resource for rural areas. Generation of bio-gas from dung and urine is a very simple and cost-effective
Q. How many cellular nuclei does the pollen tube of angiosperms have? What is ploidy of each of these nuclei? The pollen tube explicitly the mature male gametophyte of angiospe
Q. How does the sodium-potassium pump present in the cell membrane work? What is the significance of this protein for the cell? The sodium-potassium pump is the transport prote
Q. What are the major substances transferred from the mother to the fetus through the placenta? And from the fetus to the mother? From the mother to the fetus the major transfe
Q. Can we use Ethylene oxide as chemical sterilant? Ethylene oxide: This is considered as the only chemical sterilant while the others are considered merely as disinfectan
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