Human Health and Disease — BIOLOGY STD 12 Science — Question

The Leydig cells as found in the human body are the secretory source of:

The technology of biogas production from cow dung was developed in India largely by the efforts of

One functional unit of gene which specifies synthesis of one polypeptide is known as

Represented below is the inheritance pattern of a certain type of trait in humans. Which one of the following conditions could be an example of this pattern?

Presence of many embryos (Polyembryony) is a characteristic feature of

An enyme catalysing the removal of nucelotides from the ends of DNA is :

The branch of science in which fossils are studied:

Pollen tube at the time of entering embryo sac has

It is man-made ecosystem.