A group of students took an old shoe box and covered it with a black paper from all
sides. They fixed a source of light (a torch) at one end of the box by making a hole
in it and made another hole on the other side to view the light. They placed a milk
sample contained in a beaker/tumbler in the box as shown in the figure. They were
amazed to see that milk taken in the tumbler was illuminated. They tried the same
activity by taking a salt solution but found that light simply passed through it.
(i) Name the phenomenon involved
(ii) Can you suggest two more solutions which would show the same effect as
shown by the milk solution?
(iii) Explain why the milk sample was illuminated
(iv) Same results were not observed with salt solution. Why?
Answers
Answer:
ANSWER
(a) Mendel selected garden pea plant for his experiments because of the following characteristics:
(i) The flowers of this plant are bisexual.
(ii) They are self-pollinating, and thus, self and cross pollination can easily be performed.
(iii) The different physical characteristics were easy to recognise and study.
(iv) They have a shorter life span and are the plants are easier to maintain.
(b) According to Mendel's law of independent assortment, during the inheritance of two or more characters, the assortment of individual traits takes place independently during gamete formation. Thus each allele of a pair segregates independently and each gamete formed contains one allele of that trait. This law is inapplicable for linked genes.
For the cell address of any cell, we should know that The columns are named in alphabetical order and the rows in the numerical order If the cell is in the fifth column then the according to alphabetical order the fifth number alphabet is E and the row is the eighth number which named in m=numerical order so it is 8 now for the naming of any cell it is important to know that the name of the cell comes first then the name of the row So the name of the cell which is in the fifth column and eighth row is E8
Answer:
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Explanation:
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