Q1.Select the wrong pair of vegetative propoagules from the following pairs?
Answer : Option BExplaination / Solution:
The wrong pair of vegetative propoagules is rhizome-potato. Potato is grown vegetatively by eyes present on underground modified tubers. Vegetative propagation is a mode of asexual reproduction.
Q5.If you suspect deficiency of antibodies in a person, to which of the following would you look for confirmatory evidence?
Answer : Option AExplaination / Solution:
One group of gamma globulins is the immunoglobulins, which are also known as antibodies. The serum globulin electrophoresis test measures the levels of proteins called globulins in the fluid part of a blood sample. This fluid is called serum.
Answer : Option CExplaination / Solution:
Positive economics is objective and fact based, statements do not have to be correct, but they must be able to be tested and proved or disproved.
Q10.A steel railroad track has a length of 30.000 m when the temperature is 0.0∘C.Suppose that the ends of the rail are rigidly clamped at 0.0∘C so that expansion is prevented. What is the thermal stress set up in the rail if its temperature is raised to 40.0∘C? α−steel=11×10−6