Please select a subject first
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Name the following:
A plastid without pigment.
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Name the following:
The orange-red pigment found in the chromoplast.
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The basis of genetic variation in the living organisms during mitosis occurs due to ______.
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Write the full form of CFCs.
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Name the following:
The process by which intact plants lose water in the form of droplets from leaf margins.
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Name the following:
The tissue concerned with upward conduction of water in plants.
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Name the following:
The pressure which is responsible for the movement of water molecules across the cortical cells of the root.
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Mention whether the following statement is true (T) or false (F) and give an explanation in support of your answer.
Guttation is another name for bleeding in plants.
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Give two examples of cell inclusions.
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Root pressure can be measured by using ______.
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Name the eye defects caused due to each of the following:
| Cause | Eye defect | |
| (a) | Lens turns opaque | ______ |
| (b) | Uneven curvature of the cornea | ______ |
| (c) | Deficiency of vitamin A | ______ |
| (d) | Lens loses its flexibility | ______ |
| (e) | Eye ball lengthens from front to back | ______ |
| (f) | Lens becomes too flat | ______ |
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Differentiate between members of the following pair with reference to what is asked in the bracket.
Night blindness and colour blindness (sensory cells which cannot function properly).
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find odd one from following: Sewage, newspaper, Styrofoam, Hay.
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Briefly explain the following terms : Reflex action
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Which of the following is not a natural reflex action?
A. Knee-jerk
B. Blinking of eyes due to strong light
C. Salivation at the sight of food
D. Sneezing when any irritant enters the nose
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The diagram given below shows the internal structure of a spinal cord depicting a phenomenon. Study the diagram and answer the questions:
1) Name the phenomenon that is depicted in the diagram. Define the phenomenon.
2) Give the technical term for the point of contact between the two nerve cells.
3) Name the parts numbered 1, 2 and 3.
4) How does the arrangement of neurons in the spinal cord differ from that of the brain?
5) Mention two ways by which the spinal cord is protected in our body.
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Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Stimulus : Receptor :: Impulse : ______.
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Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Receptor : Sensory nerve :: Motor nerve : ______.
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Complete the following statement by choosing the correct alternative from the choice given in bracker:
Reflex action is controlled by
(i) brain (ii) spinal cord
(iii) autonomic (iii) peripheral nervous system
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