Name any two plants in which root caps are replaced by root pockets.
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(i) Find the value of k for which x=1 is a root of the equation `x^(2)+kx+3=0.` Also, find the other root. (ii) Find the values of a and b for which `
Correct Answer - (i)`k=-4," other root "=3" "(ii)" "a=4,b=5`
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A reaction in which an atom or a group of atoms in a compound is replaced by other atom or group of atoms is called ……………… reaction.
Correct option is C) substitution
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Name any two plants which show climbing roots.
Climbing roots: Different climbers with weak stem produce roots at their nodes by means of which they attach themselves to support and thereby raise themselves above the ground. e.g. Betel leaf...
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In which of the following plants, root cap is replaced by root pocket?
The correct answer is (A) Pistia
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Vidhya and Vijay were studying the effect of certain radiations on flower plants. Vidhya exposed her plants to UV rays and Vijay exposed his plants
Frequency of UV rays is greater than infrared rays, hence UV rays are much more energetic than infrared rays. Plants cannot tolerate the exposure of high energy rays. As a...
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Legume plants have root nodules. Rhizobium bacteria is present in the root nodules
(A) Symbiosis
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Name any five hybrid varieties of crop plants which have been developed in India.
1. Wheat – Himgiri 2. Rice – Jaya, Ratna 3. Brassica – PusaSwarnim 4. Cow pea – Pusa Comal 5. Chilli – Pusa Sadabahar
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Name the technique used to prevent the attack of nematode in root of tobacco plants.
RNA interference
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A Joker’s cap is in the form of a right circular cone of base radius 7 cm and height 24 cm. Find the area of the sheet required to make 10 such caps.
We have, Based radius of conical cap = r = 7cm Vertical height = h = 24 cm ∴slant height = l = \(\sqrt{r^2+h^2}\) = \(\sqrt{49+576}\) = 25 cm Required area of sheet, = 10 × πrl...
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Statement-1: For the calculation of gravitational force between any two uniform spherical shells, they can always be replaced by particles of same mas
Correct Answer - D They cannot be replaced by point masses if they are kept inside one another.
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