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Q. Do echinoderms present external or internal fecundation? Is there sex division among individuals?
The fecundation in echinoderms is external, gametes are liberated in water where fecundation occurs.
The majority of echinoderms are dioecious with female and male individuals.
a solution of 5mMol/L CaCl2 is separated from a solution of 1 micromole/L CaCl2 by a membrane that is selectively permeable to Ca+2 but is impermeable to Cl-1 what are the magnitu
SEXUA L REPRODUCTION 1 . Amphigony - Zygote is formed. (i) Syngamy Fusion of gametes. (a) Endogamy - It involves self fertilisation. e.g.
Impulses reaching the AV node from the atria are delayed a little as they pass through the trunk and crura. The impulses first reach the papillary muscles and their contraction clo
Q. Is pollution always caused by humans? In the most cases pollution is caused by human activity. Other species and some abiotic factors though can also pollute an ecosystem. F
How does the interaction between a carrier protein and the substance it transports resemble the interaction among an enzyme and its substrate? Both include the binding of a spe
Does an increase of H+ cause the hemaglobin oxygen binding curve to shift to the left or right? Explain.
Define Interaction of Vitamin K with Vitamins A and E? Excess vitamin A interferes with vitamin K absorption while the a-tocopherol or vitamin E, as we have already studied ear
Doppler echocardiogaphy is based on the Doppler effect, which was described by the Austrian phy$icist Christian Doppler in 1842. The Doppler effect states that sound frequency
Q. How does the nervous system get information about the external environment, the organs and the tissues? Information about the conditions of the internal and external environ
(a) Which elements contains Carbohydrates (b) Which elements contains Proteins a) Carbohydrates contain the elements carbon , hydrogen and oxygen. b) Protei
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