Subscribe now to access pointwise, categorized & easy to understand notes on 304 key topics of NEET (National Eligibility cum Medical Entrance Test) Biology covering entire 2017 syllabus. All the updates for one year are also included. View Features or choose a topic to view more samples.

Rs. 400.00 or

Reproduction

Bacteria reproduce by two methods

  1. Asexual reproduction
  2. Genetic recombination

1. Asexual reproduction

(i) Binary fission -

  • This is the most common method of bacterial reproduction. Binary fission takes place by amitosis. (Amitosis is characteristic of prokaryotes. Mitosis and Meiosis never occur in prokaryotes. )
  • First of all DNA replication takes place in bacterial cell. Under favourable conditions the bacterial cells divide into two cells due to formation of transverse septum
… (660 more words) …

Subscribe & login to view complete study material.

Heterotrophs

  • Most of the bacteria are heterotrophic i. e. , they cannot manufacture their own food.

  • They receive their own food from dead organic matter or living organism.

These are of following types

  1. Saprotrophic bacteria - These bacteria obtain food from dead and decaying organic matter.

    These are of two types

    1. Obligate saprotrophic - These bacteria obtain food only from dead organic matter.

      These are completely saprotrophs

      e. g. Bacillus vulgaris,

… (117 more words) …

Subscribe & login to view complete study material.

f Page
Sign In