Plant cell does not burst in a hypotonic solution because ________.
A Its cell sap is more concentrated
B Its cell wall resists bursting
C Its cell sap is rich in cellulose
D It does not have lysosomes
Which of the following curves would be obtained on heating solid naphthalene to a temperature which is above its melting point?
In the given figure, showing the ultrastructure of a plant cell, identify the parts marked as P and Q and select the correct option regarding these.
(i) Part P helps in osmoregulation.
(ii) Cellular respiration occurs in part Q.
(iii) Synthesis of sugars occurs in part Q.
(iv) Part P provides colour to flowers and fruits.
A (i) and (ii) only
B (i) and (iii) only
C (iii) and (iv) only
D (ii) and (iv) only
The figure is not clear for the students to identify the organelle
Ragini is prone to mild infections and is frequently falling ill. Doctor says that her immunity has decreased due to nutrient deficiency and advices her to take citrus fruits like tomatoes, lemons, oranges in her diet. Which of the following can be the deficient nutrient?
(a) Vitamin C
(b) Vitamin K
(c) Vitamin D
(d) Vitamin E
Sarika read that woodlice are usually found under piles of damp rotting leaves. She suggested four possible explanations for this behaviour.
1. Woodlice need rotting leaves.
2. Woodlice find their food there.
3. Woodlice need dark conditions.
4. Woodlice need a damp environment.
The above diagram shows the experiment which Sarika had conducted. Which above explanation regarding the behaviour of the woodlice was tested by Sarika?