Reproductive Health — BIOLOGY STD 12 Science — Question

Draw a labelled sketch of sparged-stirred tank bioreactor. Write its application.

Match the column first with column second correctly :

Enlist the probable causes of infertility.

Name the types of ecosystem.

How would you find genotype of a tall pea plant bearing white flowers? Explain with the help of a cross. Name the type of cross you would use.

State the stage at which oogonia reach their maximum number.

When Morgan conducted a dihybrid cross on Drosophila like Mendel did with pea plants, the F, ratios deviated significantly from that of Mendels F, ratio. Write the explanation Morgan and his group gave for the observations they obtained from their experiments.

Or

Morgan carried out several dihybrid crosses in Drosophila and found F, ratios deviated very significantly from the expected Mendelian ratio. Explain his findings with the help of an example.

Given below are the sequences of nucleotides in a particular mRNA and amino acids coded by it.
UUU AUG UUC GAG UUA GUG UAA
Phe - Met - Phe - Glu - Leu – Val
Write the properties of genetic code that can be and that cannot be correlated from the above given data.

What do you mean by fragmented habitat? Give one example.

Explain with the help of suitable examples the three different ways by which organisms overcome their stressful conditions lasting for short duration.