What is the correct sequence of sperm formation
spermatid, spermatocyte, spermatogonia, spermatozoa
Spermatognia, Spermatocyte, Spermatozoa, Spermatid
Spermatogonia, spermatozoa, Spermatocyte, Spermatid
Spermatogonia, spermatozoa, Spermatocyte, Spermatid
D.
Spermatogonia, spermatozoa, Spermatocyte, Spermatid
Spermatogonia --> Spermatocyte ---> Spermatid --> Spermatozoa
Spermatogonia are present on the inside wall of seminiferous tubule multiplied by mitotic division and an increase in number. Spermatocytes are some of the spermatogonia, which periodically undergo meiosis. The secondary spermatocytes undergo the second meiotic division to produce four, equal haploid spermatids, The spermatids are transformed into spermatozoa. (Sperm)
DNA fragments generated by the restriction endonucleases in a chemical reaction can be separated by
centrifugation
polymerase chain reaction
electrophoresis
electrophoresis
Which of the following is not correctly matched for the organism and its cell wall degrading enzyme?
Bacteria -Lysozyme
Plant cells - Cellulase
Algae - Methylase
Algae - Methylase
The colonies of recombinant bacteria appear white in contrast to blue colonies of non-recombinant bacteria because of
Non-recombinant bacteria containing β-galactosidease
Insertional inactivation of α - galactosidase in recombinant bacteria
Insertional inactivation of α-galactosidase in recombinant bacteria
Insertional inactivation of α-galactosidase in recombinant bacteria
Secondary productivity is rate of formation of new organic matter by
producer
parasite
consumer
consumer
Which one of the following is not used for ex-situ plant conservation?
Field genebanks
Seed banks
Shifting cultivation
Shifting cultivation
