GENERAL SCIENCE
CLASS-X PAPER- II
MARKS: 40 PART-A (35M)
SECTION-1
ANSWER THE FOLLOWING (7X1=7)
1. What is paleontology?
2."Omnis cellula de cellula" what does the above phrase mean?
3. What is the job of amniotic fluid?
4. Why did August Wiseman opposed law of inheritance of acquired characters.
5. If the shape and size of small intestine is like esophagus, what will happen?
6. How are hunger pangs generated?
7. Write about energy flow in a food chain as per 10% law.
SECTION-II
ANSWER THE FOLLOWING IN 3-4 SENTENCES (6X2=12)
8. Why testes are located outside the abdominal cavity in males?
9. Draw any two phases of mitosis and label them.
10. Why Mendel has chosen garden pea as a material for his experiments?
11. List out some ground water conservation methods.
12. Define the terms Bioaccumulation and Biomagnification.
13. Write a note on analogous and homologous organs.
SECTION-III
THE FOLLOWING QUESTIONS BY INTERNAL CHOICE (4X4=16)
14. Describe various modes of asexual reproduction? or
Explain double fertilization in plants with the help of a neat labelled diagram?
15. What experiment should you perform to understand the action of saliva on flourExplain procedure and observation. Or
Suggest a simple experiment to prove the role of palate in recognizing the taste.
16. Explain monohybrid cross with the help of checker boards. Mention phenotypic and genotypic ratios.
Or
Male is responsible for sex determination of the baby. Do you agree? Explain with the help of a flow chart.
17. What is an ecological pyramid? Explain types of ecological pyramids? Or
Define sustainable development. Write about conservation of resources with the help4R principle.
Choose the correct answer: (10x1/2=5m)
1. _____ plants are used for production of biofuel. ( )
a. Havea brazilliances
b. Jatropa
C. Madri d.Gliricidia
2. What does a food chain always start with? ( )
a. Herbivores b. Carnivores
c. Producers d. None
3. The study of embryos is called ( )
a. Geology b. Microbiology
c. Embryology d. genetics
4. The process of preparation of biofuels is called ( )
a. Fermentation
b. Bioesterfication
c. Conjugation
d. Magnification
5. A surgical birth control method performed in females is ( )
a. Tubectomy b. Vasectomy
c. Copper-T d. diaphragm
6. Natural selection means ( )
a. Nature selects the desired characters
b. Nature rejects the characters
c. Nature reacts with an organism
d. None
7. 2:1:2:3 is the ratio in our dentition. Here 1 represents ( )
a.incissors b. canines
C. molars d. premolars
8. The part of female reproductive system that produces eggs___ ( )
a. Ovary b. Epididymis
c. Cervix d. Fallopian tube
9.______is the bacterial sexually transmitted disease. ( )
a. AIDS b. marasmus
c. syphilis
d. bacterial inflammation.
10. The nerve which takes signals of hunger pangs to brain___ ( )
a. 5th cranial nerve
b. Vagus nerve
c. motor nerve
d.optic nerve.
- Lakshmi
Science Teacher
The Mother’s Integral School, O.U Road, Hyderabad