CBSE - X
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CBSE X Time allowed: 3 hours; Maximum Marks: 100 |
| General Instructions: | |
| 1) | The question paper comprises of two sections A and B. You are to attempt both sections. |
| 2) | You are advised to attempt all the questions of Section A and Section B separately. |
| 3) | All questions are compulsory. |
| 4) | There is no overall choice. However, internal choice has been provided in some questions. You are to attempt only one option in such questions. |
| 5) | Marks allocated to every question are indicated against it. |
| 6) | Questions number 1-4 in Section A and 17, 18 in Section B are very short answer questions. These are to be answered in one word or one sentence. |
| 7) | Questions number 5-8 in Section A and 19, 20 in Section B are short answer questions. These are to be answered in 30 - 40 words each. |
| 8) | Questions number 9-14 in Section A and 21 - 23 in Section B are also short answer questions.These are to be answered in 40 - 50 words each. |
| 9) | Questions number 15, 16 in Section A and 24 in Section B are long answer questions. These are to be answered in 70 words each. |
Question 17
17. What is meant by ‘translocation’ with respect to transport in plants ?
Question 18
18. What is a ‘ganglion’?
Question 19
19. Anil has blood group ‘A’ while Om has blood group ‘O’.
(a) Persons of which blood group(s) can receive blood from
(i) Anil and (ii) Om ?
Persons with blood groups ‘A’ or ‘AB’ can receive blood from Anil.
Persons with all blood groups, i.e A, B, AB, O can receive blood from Om,
because ‘O’ blood group people are universal donors.
(b) Who can donate blood to (i) Anil and (ii) Om?
(i)Persons with Blood group ‘A’ or ‘O’ can donate blood to Anil.
(ii)Persons with ‘O’ blood group only can donate blood to Om.
OR
Draw the human heart and label (i) Aorta and (ii) Coronary artery on it.
Question 20
20.What is autonomic nervous system ? Name the subsystems in which it is subdivided.
Question 21
21. (a) How is the process of binary fission different from budding ?
(b) What is grafting?
(c) List two advantages of vegetative propagation.
OR
Draw a diagram to illustrate fertilization in a flowering plant and label the following init
(a)Pollengrains
(b)Egg
Question 22
22. How is the sex of the offspring determined in the zygote ? Explain.
Question 23
Distinguish between ‘Conservation’ and ‘Preservation’. Suggest any four practices which may help in protecting our environment.
Question 23
24. (a) Draw the respiratory system of human beings.
(b) Label the following on the diagram drawn :
(c) What happens to the carbon dioxide which collects in human tissues ?
| Section A |