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Fragmentation
In this type an organism breaks down into two or more pieces, each of which grows into a new individual. This means of reproduction is found in the organisms -which have good power of regeneration. Sponges and hydroid coelentrates exhibit this type of reproduction. If a sponge is macerated by pressing it through fine gauge, the separated cells come together in groups and grow into new individuals.
Very small fragments of free-living flatworms will regenerate into new individuals if right conditions are provided to them. A nemertine worm, Lineus, develops rings of constriction which cut the body into short fragments. These animals possess large number of undifferentiated cells which, when required can proliferate and develop into any kind of tissue.
Which of the below are skin receptors in humans which are sensitive to heat? Are they: a) End organs of Krause b) Meissner's corpuscles c) End organs of Ruffini d)
1. Biogas is produced by the activity of aerobic bacteria on animal waste 2. Methanobacterium is an aerobic bacterium found in rumen of cattle 3. Biogas, commonly called goba
TESTE S (TESTICLES) - 2 in number (Diarchic). Pinkish in colour. Oval shaped. 4-5 cms long, 2.5 cm wide and 3 cm thick. Mesodermal. In embryonic stage attached to kid
Q. Is Diabetes causes the cardiovascular disease? Diabetes: Sustained hyperglycemia is associated with tissue damage and cardio- myopathies. You shall study about diabetes and
Define Methodology for Half and Full Saturation Test? 1. Take 5 ml each of starch and dextrin solutions, add 5 ml of saturated solution of ammonium sulfate. Shake thoroughly an
P o x diseases Small-pox in human beings and pox in a few animal species are closely related to each other. It is shown by the fact that the vaccine for the prevention of sma
Which one of the following is one of the characteristics of a biological community? 1. Stratification 2. Natality 3. Mortality 4. Sex-ratio Stratification
Results of Monohybrid Crosses Mendel got the following results from his monohybrid crosses :- 1. F 1 plants produced by a cross between two plants pure for the cont
Three point charges are located at the corners of an equilateral triangle as in the figure below. Find the magnitude and direction of the net electric force on the 1.40 µC charge.
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