Between an annual and a perennial plant, which one has a shorter
juvenile phase? Give one reason.
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The longest side of a triangle is 3 times the shortest side and the third side is 2 cm shorter than the longest side.
Solution: Let the minimum length of the shortest side be x. Then the longest side of a triangle is 3x and the third side is 3x – 2. Perimeter of the triangle ≥ 61 x +...
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The diagonal of a rectangular field is 60 metres more than the shorter side. If the longer side is 30 metres more than the shorter side,
Solution: Let the length of the shorter side be x metres. Thus the length of the longer side=(x+30) m Length of the diagonal=(x+60)m Each angle of a rectangle=90 degrees By Pythagoras Theorem, (diagonal)2=(shorter side)2+(longer side)2 (x+60)2 ...
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Leaves of a healthy potted plant were coated with vaseline. Will this plant remain healthy for long? Give reasons for your answer.
The plant will not remain healthy for long and it will die. Vaseline is thick and it will block the stomata so there will be no intake of carbon dioxide. It will...
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A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because
(a) tallness is the dominant trait
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Define (a) Juvenile phase, (b) Reproductive phase, (c) Senescent phase.
(a) Juvenile phase: It is the period of growth in an individual organism after its birth and before it reaches reproductive maturity. (b) Reproductive phase: It is the period when an individual organism...
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Why does Pendulum have less SHM at longer amplitudes compared to shorter amplitudes ?
The longer the length of string, the farther the pendulum falls; and therefore, the longer the period, or back and forth swing of the pendulum. The greater the amplitude, or angle, the farther the pendulum falls;...
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In an annual examination Harish scores a total of 421 marks out of 675. What is his approximate percentage in the annual examination ?
(e) Percentage of marks obtained by Harish =421/678 x 100 = 62.4 = 62
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According to Allen’s Rule, the mammals from colder climates have: a. shorter ears and longer limbs
c. longer ears and longer limbs
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Formation of tropical forests needs mean annual temperature and mean annual precipitation as:
a. 18 – 25°C and 150 – 400cm
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Twenty five percent of Pranab’s annual salary is equal to eighty percent of Surya’s annual salary.
(d) Dhreeu’s monthly salary = 6,00,000 /12 = Rs.50,000 Surya’s monthly salary = 50,000 x 40 /100 = Rs.20,000 Pranab’s monthly salary = 20,000 x 80 /25 =Rs.64,000
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