Bacteria are prokaryotes. They are single-celled organisms and microscopic. It does not have well defined nucleus and cell organelles. Thus, mitochondria is absent in them.

EDUSAT or GSAT-3 is a communications satellite which was launched on 20th September, 2004 by the Indian Space Research Organisation. EDUSAT is the first Indian satellite built exclusively to serve the educational sector. It has revolutionised classroom teaching through IP based technology

1. Ornithology is a branch of zoology that studies birds. It studies different species of birds, their size, shape, colour, behaviour, habitat, reproduction and other aspects.

2. Ornithologists use a variety of methods to collect information about birds, such as field surveys, bird watching, studying bird behavior, and studying fossils.

As an end product, lactic acid is produced which makes the milk thicker and finally converts it into curd.