Many fresh water animals cannot survive in marine environment. Explain.
Fresh water animals cannot survive in marine environment because their body is not adapted to it. When placed in marine environment their body loses water because the surrounding has higher concentration of salt as compared to their body. The loss of water poses difficulty in their survival and may even result in their death.
Indiscriminate diagnostic practices using X-rays etc., should be avoided. Give one reason.
State a reason for the increased population of dark coloured moths coinciding with the loss of lichens (on tree barks) during industrialization period in England.
Mention a product of human welfare obtained with the help of each one of the following microbes:
(a) LAB
(b) Saccharomyces cerevisiae
(c) Propionibacterium sharmanii
(d) Aspergillus niger
A geneticist interested in studying variations and patterns of inheritance in living beings prefers to choose organisms for experiments with shorter life cycle. Provide a reason.
After a brief medical examination a healthy couple came to know that both of them are unable to produce functional gametes and should look for an ‘ART’ (Assisted Reproductive Technique). Name the ‘ART’ and the procedure involved that you can suggest to them to help them bear a child.
