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Q. How do chordates reproduce?
Reproduction in beings of the phylum Chordata is sexual, with the exception of urochordates that can be also reproduce asexually. In some classes (cyclostomes, amphibians and osteichthyes fishes) there is larval stage. With rare exceptions, amphibians, fishes, monotreme and reptiles mammals are oviparous, egg-laying (embryos develop outside the mother's body and within eggs) and marsupial and placental mammals are viviparous (embryos develop inside the mother's body, feeding from her).
Slight or no Metamorphosis In primitive wingless insects (Apterygota) such as spring tails, silver fish etc. and in secondarily apterous insects the young ones which hatch fr
Human Impact on Nitrogen Cycle Human activities are profoundly affecting the cycling of nitrogen in nature. Over 30 x 10 6 metric tons/yr. of N 2 is fixed in the commercial
Give the causative organism and symptoms of Bacillary Dysentery • Bacillary dysentery is caused by Shigella sp. (Shigella sonnei, S. dysenteraei). Incubation period is
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Which of the following serves as a sensor, or as part of a sensor, that functions in a positive feedback system? A. CaSRs (Calcium-Sensing Receptors) situated in the plasma mem
The two gases making highest relative contribution to the greenhouse gases are: 1. CO2 and CH4 2. CH4 and N2O 3. CFC55 and N2O 4. CO2 and N2O CO2 and CH4
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The upper or mountain course - Classification of the river Here the water is fast flowing and runs through a 'V' shaped valley with unstable banks. The fast flowing water has
What is Asexual Reproduction? Asexual reproduction occurs in prokaryotes through the process of binary fission. Primitive eukaryotes and plants also reproduce by various t
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