Human Health and Disease — BIOLOGY STD 12 Science — Question

Sperm fertilizes ovum in the ……………….. of fallopian tube.

…………….. takes place when one male gamete and the egg fuse together. The fertilized egg grows vs into seed from which the new plants can grow.

In oviparous animals like reptiles and birds, the fertilised egg is covered by a ____________ shell and laid in a safe place.

Gonorrhoea is caused by ……………….. bacteria.

Excess growth of ____________ algae causes algal bloom in eutrophied waterbodies.

_________ is the process of extraction of DNA from the separated bands of DNA in agarose gel.

____________ percent of the forests have been lost in the tropics.

Vertical distributioon of different species occupying different levels in an ecosystem, is called _____________.

Fill in the blanks.The major reservoir of carbon on earth is ________.

fish breed only once in their life time.