6.
7.
3. Complete the statements by choosing
correct options from bracket.
(Gene, Mutation, Translocation,
Transcription, Gradual development,
Appendix)
a. The causality behind the sudden
changes was understood due to ----
principle of Hugo de Vries,
b. The proof for the fact that protein
synthesis occurs through -- - was
given by George Beadle and
Edward Tatum.
c. Transfer of information from
molecule of DNA to mRNA is
called as
d. Evolution means -- -- -- --
e. Vestigial organ
human body is proof of evolution.
process.
present in
4. Write short notes based upon the
information known to you.
a. Lamarckism
b. Darwin's theory of natural selection.
c. Embryology
d. Evolution
lil
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organism are believed to have developed from earlier forms during the history of the earth.
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a. The causality behind the sudden changes was understood due to Mutation principle of Hugo de Vries.
- Mutation is the sudden and permanent change in the gene or DNA.
- It causes change in the genetic characters of the individual.
b. The proof for the fact that protein synthesis occurs through translocation was given by George Beadle and Edward Tatum.
- Translocation: it is the simultaneous movement of two tRNA molecules together with the mRNA by one codon on the ribosome.
c. Transfer of information from molecule of DNA to mRNA is called as transcription process.
- Transcription: it is a process in which mRNA (messenger RNA) is synthesized from a DNA.
- This process occurs in the nucleus of a cell.
d. Evolution means gradual development.
- Evolution is the gradual change from simple to complex over a period of time.
- Example. Invertebrates evolve to vertebrates.
e. Vestigial organ appendix present in human body is proof of evolution.
- Vestigial organs: Those organs which are of no use in our body but our ancestors had use them.
- Appendix is most known such organ in the human body.
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