Organisms and Populations — BIOLOGY STD 12 Science — Question

Answer the following questions:
Name the organs where gametogenesis gets completed in human male and female, respectively.

Write the scientific name of the bacteria that causes pneumonia. What happens in this disease? What are its symptoms?

Answer the following questions:
Write the specific location and the functions of the following cells in human males:

1. Leydig cells.
2. Sertoli cells.
3. Primary spermatocyte.

Try to trace the various component of human evolution (Hint: brain size and function, skeletal structure dietary preferences, etc.).

Describe the characteristics a cloning vector must posses.

Enumerate the role of microbes in producing some household products.

Enumerate the events in the ovary of a human female during:
Luteal phase of menstrual cycle.

Describe in detail the various ancient and modern hypothesis given to explain the origin of life on earth.

Bioreactors are the containment vehicles of any biotechnology-based production process. For large scale production and for economic reasons the final success of biotechnological process depends on the efficiency of the bioreactor.
Answer the following questions w.r.t. the given paragraph:
i. List the operational guidelines that must be adhered to so as to achieve optimisation of the bioreactor system. Enlist any four.
ii. Mention the phase of the growth we refer to in the statement Optimisation of growth and metabolic activity of the cells.
iii. Is the biological product formed in the bioreactor suitable for the intended use immediate? Give reason in support of your answer.

State the modifications of forelimb in animals as an example of homology.