NATIONAL ACADEMY FOR LEARNING
BENGALURU
2020-2021
SECOND TERM EXAMINATION
BIOLOGY
Grade:7 Maximum Marks: 40
Time: 1 hr 15 min No. of Pages: 4
General Instructions:
• The first 10 minutes is to be spent in reading the question paper.
• You will not be allowed to write during the first 10 minutes.
• The time given at the head of the paper is the time allowed for writing the answers.
• The intended marks for questions or parts of questions are given in brackets.
1. Choose the correct option: [5]
a. Fluid connective tissue of humans is
i. blood and cartilage.
ii. lymph and plasma.
iii. blood and lymph.
iv. stroma and matrix.
b. Paramecium is a
i. Bacterium.
ii. Protozoan.
iii. Virus.
iv. Annelid.
c. I sometimes get confused by others to be a plant. I’m heterotrophic and digest
decaying material. Which kingdom do I belong to?
i. Archaebacteria
ii. Animalia
iii. Fungi
iv. Protista
d. The kidney tissues that are shaped like cones areare
i. Renal pelvis.
ii. Renal pyramids.
iii. Renal calculi.
iv. Renal vasculitis.
e. During photosynthesis
i. solar energy is converted into chemical energy.
ii. solar energy is converted into mechanical energy.
iii. chemical energy is converted into mechanical energy.
iv. bioenergy is converted into chemical energy.
Page 1 of 4
2. Here are the instructions for testing a leaf for starch. They are in the wrong order. Write [2]
down the sentences of instruction in the correct order.
a. Dip a freshly picked leaf in boiling water to soften it.
b. Take out the leaf from the test tube carefully and wash it with water.
c. Pour drops of iodine on the leaf.
d. Boil the leaf in ethanol taken in a test tube to remove the chlorophyll.
3. Observe the given diagrams A and B and answer the questions that follow. [2]
A B
a. Identify the tissues A and B.
b. Though they belong to the same type of a tissue, they are structurally and functionally
different from one another. Give one such functional difference between the two.
4. Give a scientific reason for the following: [2]
a. Rhizopus does not grow in the lower layers of bread.
b. Earthworms are hermaphrodites.
5. The oxygen supply to plants also runs out if the soil gets waterlogged. In this case, the root [2]
cells obtain energy through different type of respiration.
Figure 1
a. Identify the type of respiration in figure 1.
b. Sometimes vigorous exercise can cause muscle cramps. Justify.
6. The process of excretion in humans can take place with the help of different organs. Write [2]
the role of the following organs in this regard.
a. Liver
b. Skin [2]
7. Differentiate between the following terms based on the given criteria:
a. Homeotherm and Poikilotherm [definition]
b. Tube feet and Nephridia [function]
Page 2 of 4
8. Draw a well labelled diagram depicting the structure of a bacterial cell and label the parts [3]
which:
a. help in locomotion
b. is a primitive nucleus
c. is the outermost covering
d. encases all the components
9. Rahul set up an experiment shown in the diagram below and places the experimental set
up in bright sunlight for 3-4 hours. Study the diagram and answer the questions that [3]
follow:
a. Label the parts marked 1 and 2
b. What is the aim of the experiment?
c. Describe the changes observed.
10. The diagram below represents different types of plant tissues. Observe the diagram [3]
and answer the questions that follow:
X Y Z
a. Identify the tissues X, Y and Z.
b. Name the tissue which:
i. provides strength and flexibility
ii. is commercially exploited to obtain hemp and jute
iii. has lot of air spaces and helps plant to float
11. Draw a neat and well labelled diagram of the internal structure of the kidney. [3]
Page 3 of 4
12. Explain how the following factors influence the process of photosynthesis. [3]
a. chlorophyll
b. temperature
c. water and minerals
13. Give an example of an animal which shows each of the following characteristics: [3]
a. sedentary animal with a pore bearing body
b. star-shaped body
c. flattened ribbon like body
d. tentacles around the mouth
e. each segment with two pairs of legs
f. body is soft and unsegmented
14. The diagram given below represents the human urinary system. Observe the diagram and [5]
answer the questions that follow.
a. Label the parts marked 1 to 4
b. Explain in brief the role of detrusor muscles in the release of urine.
c. List two important functions of part labelled 2.
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Instructions:
i. Please scan your paper, convert it into a single vertical pdf copy.
ii. Rename it: - Full Name- Grade-Section-Subject-T2
iii. The subject line of the mail also should have the same nomenclature as
mentioned above.
iv. Mail it to your invigilating teacher.
Page 4 of 4
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