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write 2major adaptations in animals exhibiting external fertilization

The major features found in animals exhibiting external fertilization are

  • The gametes are produced in large number
  • Usage of chemical signals or other stimuli to ensure that the gametes at the same time and place.
  • Absence of proper parental care to the offspring,

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361 base pairs[1]in length and contains therepliconof plasmid pMB1, theampRgene, encoding theampicillinresistanceprotein(source plasmidRSF2124) and thetetRgene, encoding thetetracyclineresistance protein (source plasmidpSC101). The plasmid has uniquerestriction sitesfor more than fortyrestriction enzymes. 11 of these 40 sites lie within thetetRgene. There are 2 sites for restriction enzymesHindIIIandClaIwithin thepromoterof thetetRgene. There are 6 keyrestriction sitesinside theampRgene. The origin of replication ororisite in this plasmid is pMB1 (a close relative of ColE1).[2]

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