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Why do plant cells have an additional layer surrounding the cell membrane?
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0
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2868
|
March 24, 2018
|
|
Cells consist of many organelles, yet we do not call any of these organelles as structural and functional unit of living organisms
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0
|
5475
|
March 24, 2018
|
|
Explain why chloroplasts are found only in plant cells
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0
|
14772
|
March 24, 2018
|
|
‘Cells are the basic structural units of living organisms’
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0
|
15261
|
March 24, 2018
|
|
Where are chromosomes found in a cell? State their function
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0
|
3522
|
March 24, 2018
|
|
Make a sketch of the human nerve cell. What function do nerve cells perform?
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0
|
12301
|
March 24, 2018
|
|
Differentiate between ,Internal fertilisation and external ,fertilisation A zygote and an embryo
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0
|
8430
|
March 23, 2018
|
|
Define asexual reproduction. Describe two methods of asexual reproduction in animals
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0
|
22144
|
March 23, 2018
|
|
Observe the following figures
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0
|
860
|
March 23, 2018
|
|
Hens and frogs are both oviparous exhibiting different types of fertilisation. Explain
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0
|
4870
|
March 23, 2018
|
|
After observing above figure, answer the following
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|
0
|
1013
|
March 23, 2018
|
|
What is metamorphosis? Give examples
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0
|
14254
|
March 23, 2018
|
|
How can we say that fish exhibits external fertilisation?
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0
|
1417
|
March 23, 2018
|
|
Describe the process of fertilisation in human beings
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0
|
6017
|
March 23, 2018
|
|
Explain the importance of reproduction in organisms
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0
|
789
|
March 23, 2018
|
|
Observe the figure given below and answer the questions that follow
|
|
0
|
1352
|
March 23, 2018
|
|
Mother gives birth to a baby but the baby has characters of both parents
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|
0
|
2632
|
March 23, 2018
|
|
The term metamorphosis is not used while describing human development. Why?
|
|
0
|
2537
|
March 23, 2018
|
|
Write notes on: (a) Adam’s apple. (b) Secondary sexual characters. (c) Sex determination in the unborn baby
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|
0
|
2511
|
March 23, 2018
|
|
What are sex hormones? Why are they named so? State their function
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|
0
|
1639
|
March 23, 2018
|
|
Prepare a table having two columns depicting names of endocrine glands and hormones secreted by them
|
|
0
|
4016
|
March 23, 2018
|
|
List changes in the body that take place at puberty
|
|
0
|
936
|
March 23, 2018
|
|
Our government has legalised the age for marriage in boys and girls. Give reasons as to why one should get married after a certain age
|
|
0
|
2980
|
March 23, 2018
|
|
Observe the given chart and graph carefully and answer the questions that follow
|
|
0
|
1349
|
March 23, 2018
|
|
John and Radha were classmates since childhood
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|
0
|
1878
|
March 23, 2018
|
|
In human females, each time during maturation and release of egg the inner wall of uterus thickens. Is this thickening permanent? Give reasons
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|
0
|
2198
|
March 23, 2018
|
|
Given below are certain food items required for proper nourishment of adolescents. Name the nutrients present in the food items and write their functions
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|
0
|
3294
|
March 23, 2018
|
|
During adolescence, the body of boys and girls undergoes certain changes
|
|
0
|
3728
|
March 23, 2018
|
|
Give a suitable word for each of the following statements
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|
0
|
691
|
March 23, 2018
|
|
Salma had a very soft and smooth skin during her childhood
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|
0
|
1345
|
March 23, 2018
|