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Question Paper

The document contains a series of questions covering various biological concepts, including autotrophs, human anatomy, genetics, ecology, and environmental issues. It addresses topics such as nutrient acquisition, spinal cord protection, DNA replication accuracy, species variation, trophic levels, energy production in the body, plant movements, reproductive structures, Mendelian genetics, pollution effects, circulatory systems, and sex determination. Each question prompts exploration of fundamental biological principles and their implications for organisms and ecosystems.

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Apoorva Pareek
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16 views1 page

Question Paper

The document contains a series of questions covering various biological concepts, including autotrophs, human anatomy, genetics, ecology, and environmental issues. It addresses topics such as nutrient acquisition, spinal cord protection, DNA replication accuracy, species variation, trophic levels, energy production in the body, plant movements, reproductive structures, Mendelian genetics, pollution effects, circulatory systems, and sex determination. Each question prompts exploration of fundamental biological principles and their implications for organisms and ecosystems.

Uploaded by

Apoorva Pareek
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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1.​ How do autotrophs obtain CO2 and N2 to make their food?

2.​ How is the spinal cord protected in the human body?


3.​ What is the effect of DNA copying which is not perfectly accurate on the reproduction
process?
4.​ Why is variation important for a species?
5.​ In a food chain of frog, grass, insect and snake, assign trophic level to frog.
6.​ Write two different ways in which glucose is oxidised to provide energy in the human
body. Write the products formed in each case.
7.​ What are ‘nastic’ and ‘curvature’ movements? Give one example of each.
8.​ Name the reproductive parts of an angiosperm. Where are these parts located?
Explain the structure of its male reproductive part.
9.​ A mendelian experiment consisted of breeding Pea plants bearing violet flowers with
Pea plants bearing white flowers. What will be the result in F1 progeny?
10.​Use of several pesticides which result in excessive accumulation of pesticides in
rivers or ponds, is a matter of deep concern. Justify this statement.
11.​a. What is double circulation?
b. Why is the separation of the right side and the left side of the heart useful? How
does it help birds and mammals?
12.​A squirrel is in a scary situation. Its body has to prepare for either fighting or running
away. State the immediate changes that take place in its body so that the squirrel is
able to either fight or run.
13.​What is the effect of DNA copying, which is not perfectly accurate, on the
reproduction process? How does the amount of DNA remain constant though each
generation is a combination of DNA copies of two individuals?
14.​What are chromosomes? Explain how in sexually reproducing organisms the number
of chromosomes in the progeny is maintained.
15.​Write one difference between biodegradable and non biodegradable wastes. List two
impacts of each type of the accumulated waste on environment if not disposed off
properly.
16.​a. Name the organs that form the excretory system in human beings.
b. Describe in brief how urine is produced in human body.
17.​Explain the following:
a.​ Auxin
b.​ Abscisic acid
c.​ Phototropism
d.​ Geotropism
18. Define pollination. Explain different types of pollination. List two agents of
pollination? How does suitable pollination lead to fertilization.
19. ‘The sex of a new born child is a matter of chance and none of the parents may be
considered responsible for it.’ justify this statement with the help of flow chart showing sex
determination of a newborn.
20. a. How is ozone formed in the upper atmosphere? Why is damage to ozone layer is
a cause of concern to us? What causes this damage?
b. We do not clean ponds or lakes, but an aquarium needs to be cleaned regularly.
Explain.

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