Biodiversity and Conservation — BIOLOGY STD 12 Science — Question

How spermiogenesis and spermiation differ from each other?###Define spermiogenesis and spermiation.

Create the symbol used for male, female copulation and homogancy in human genedlogical analysis.

(i) Write the name of the form of malaria parasite in which it enters (a) the human body and (b) the body of female anopheles respectively.
(ii) Name the hosts within which sexual and asexual reproduction of malaria parasite takes place respectively.
(iii) Write the name of the toxin responsible for causing symptoms of malaria in humans. Why are these disease symptoms recurring?

What are the assumptions that led to the human genome project?

What was Lamarck’s theory of evolution? Explain the theory by quoting an example.

Can you think of a situation where we deliberately want to make a species extinct? How would you justify it ?

Comment on the utility of variability in number of tandem repeats during DNA fingerprinting.

Draw a labeled diagram of male reproductive system.

The tobacco smoking is associated with the rise in blood pressure and emphysema (oxygen deficiency in the body). Explain.

Why are biogas plants considered more beneficial in rural areas?