Short Answer TypeOur government has intentionally imposed strict conditions for M.T.P. in our country. Justify giving a reason.
What role does an individual organism play as per Darwin’s theory of natural selection?
A mature embryo sac in a flowering plant may possess 7-cells, but 8-nuclei. Explain with the help of a diagram only.
Mention the evolutionary significance of the following organisms:
The evolutionary significance of given organisms are as
follows:
(a) Shrews The first mammals. These were long tailed, insectivorous, squirrel-like organisms. They gave rise to primitive primates. For example, leones, tarsiers at the beginning of the Palaeocene era.
(b) Lobefins The first amphibians. Modern day frogs and salamanders have evolved from them.
(c) Homo habilis The first human-like primates, lived in Africa about 2 million years ago. They had brain capacity of 700 cc. Also called handy man as they were first and most skillful tool makers.
(d) Homo erectus They appeared after Homo habilis, 1.7million years ago. They had large brain capacities, i.e. 800-1100 cc and were omnivores.
In an agricultural field, there is a prevalence of the following organisms and crop diseases which are affecting the crop yield badly:
(a) White rust (b) Leaf and stripe rust
(c) Black rot (d) Jussids
Recommend the varieties of crops the farmers should grow to get rid of the existing problem and thus, improve the crop yield.
How does the application of the fungal genus, Glomus, to the agricultural farm increase the farm output?
Plenty of algal bloom is observed in a pond in your locality.
(a) Write what has caused this bloom and how does it affect the quality of water.
(b) Suggest a preventive measure.
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