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How do Organisms Reproduce?
Explain how the developing embryo gets nourishment inside the mother's body.
The foetus gets its nourishment from the special tissue called placenta. After implantation, a disc-like special tissue called placenta develops between the uterus wall and the embryo. The placenta helps in the exchange of nutrients, oxygen and waste products between the embryo and the mother. Thus, it provides nourishment to the growing embryo.
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Name the method by which spirogyra reproduces under favourable conditions. Is this method sexual or asexual?
What happens when :
Accidently, Planaria gets cut into many pieces?
What happens when :
Bryophyllum leaf falls on the wet soil?
What happens when :
On maturation sporangia of Rhizopus bursts?
State the changes that take place in the uterus when :
Implantation of the embryo has occurred.
State the changes that take place in the uterus when :
Female gamete/egg is not fertilised
Name the organ that produces sperms as well as secretes a hormone in human males. Name the hormone it secretes and writes its functions.
Name the parts of the human female reproductive system where fertilisation occurs.
Explain how the developing embryo gets nourishment inside the mother's body.
A student while observing an embryo of a gram seed listed various parts of the embryo as listed below :
Testa, Micropyle, Cotyledon, Tegmen, Plumule, Radicle. On examining the list the teacher commented that only three parts are correct. Select these three correct parts :
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