Name a waste gas released by the plants
(a) only during the day time, and
(b) only during the night time.
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Nocturnal animals (animals which sleep during the day and come out at night) tend to have wide pupils and lot of rods in their retinas.
Wide pupils allow more light to enter the eye during night. Rod cells in the retina are sensitive to dim light and hence help in seeing properly at night.
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Name the two parts of a plant through which its gaseous waste products are released into the air.
Stomata in the leaves and lenticels in the stems are two parts through which a plant releases its gaseous waste products into the air.
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(a) What are the methods used by plants to get rid of their waste products ? (b) How are waste products excreted in Amoeba ?
(a) Thevarious methods used by the plants to get rid of their waste products are (i) the plants get rid of gaseous waste products through stomata in leaves and lenticels in...
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How does a biodegradable waste differ from a non-biodegradable waste ? Give two examples of non- biodegradable wastes which pollute our environment.
Bioderghradable Wastes 1. Those waste materials which can be broken down to non-poisonous substances in nature by the action of microorganisms (like bacteria) are called biodegradable wastes. 2. They get recycled and...
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A ship crossing international date line at mid-night on Wednesday Eastwards, find that it is mid-night Tuesday on American side. Why ?
A ship crossing international date line from West to East gains a day. It repeats a day. A day is subtracted from the calendar. So when it is Wednesday mid-night...
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Briefly state the procedure of treating waste water by primary and secondary treatment. What happens in the tertiary treatment of waste water ?
In primary treatment the run-off should be drained through screens, grit chambers and sedimentation tanks to remove toxic chemicals from the water. In secondary treatment the waste water the primary...
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Why is open dumping of solid waste not advisable ? What is done while segregating solid waste ?
Open solid waste may pollute directly the air, besides this by washing with rainwater run-off it may pollute a large area and cause soil and water pollution. On the other...
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How would the breezes that blow during the day and those that blow during the night affect the temperature of a place situated in the coastal region ?
During the day the sea breeze blowing from sea towards land keeps the coastal region cool and during the night land breeze blowing from land towards sea makes the sea...
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One day the meter reading is found to be 7643 units while next day, it was 7657 units. What is the consumption of electricity in a day ?
Final reading 7657 units Initial reading 7643 units Consumption of electricity in a day = Final reading-initial reading = 7657 – 7643 = 14 units.
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In a mono hybrid cross between tall pea plants (TT) and short pea plants (tt) a scientist obtained only tall pea plants (Tt) in the F1 generation.
Yes, the scientist may arrive at the law of dominance according to which the trait that is expressed in the F1 generation is the dominant trait, although both the dominant...
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