Human Reproduction — BIOLOGY STD 12 Science — Question

Number of death and birth in the last stage of plateau growth curve of a population will be:

Choose correct sentence.

Sex is determined in human beings:

DNA is a polymer of nucleotides which are linked to each other by 3’-5’ phosphodiester bond. To prevent polymerisation of nucleotides, which of the following modifications would you choose?

Mexican dwarf varieties of wheat were developed by:

India has how many biosphere reserves.

Half-life period of C14 is about.

A human male produces sperms with the genotypes AB, Ab, aB, and ab pertaining to two diallelic characters in equal proportions. What is the corresponding genotype of the person?

Devices for self-pollination are

Filaria is transmitted by