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In earthworms, when the ovaries mature, the clitellum secretes a viscous substance in the form of a girdle. This girdle hardens in to a cocoon around the clitellum. The ova are discharged into cocoon. When this cocoon moves over the spermathecae openings, the sperms which are already collected from another worm and stored in the spermathecae are discharged into the cocoon. The cocoon finally, comes out of the body and fertilization takes place in the cocoon. As it is taking place outside the body, it is called as "external fertilization".
Q. What are compound eyes? Arthropods have compound eyes made of several visual units called as ommatidia. Each ommatidium transmits visual information through the optic nerve
What are bacteriophages? Bacteriophages are viruses specialized in parasitism of bacteria. They are used in genetic engineering as molecular cloning vehicles to insert recombin
Q. What do you know Zoological Parks? Zoological park has two faced aspects, the relationship between man and beast. There is awe and there is slaughter. There is worship and t
CONJUNCTI V A - Ectodermal in origin. Formed by epidermis. It is thin, transparent covers cornea. Made up of stratified epithelium. It has 2 parts - (i) Ocular conjunct
Q. Into which two groups can the nitrogen-containing bases that form RNA and DNA be classified? What is the criterion used in to that classification? The nitrogen-containing ba
What is the other name given to sex chromosomes? Sex chromosomes are also known as allosomes (the other chromosomes that are not sex chromosomes are known as autosomes).
#question.bacteria and virus are meet so what happen.
Life cycle of sporozoans The complex life cycle of sporozoans typically involves an asexual and a sexual phase. Sporozoans are haploid except for the zygote. The zygote underg
Explain Free Water - Water Found in Food? Water which is bound by such minute forces, that its vapour pressure is equal to the vapour pressure of pure water. It can be found as
In marked contrast to prokaryotic genes where proteins are encoded by a continuous sequence of triplet codons and the vast popular of protein-coding genes in eukaryotes are discont
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