🔰 CHEMISTRY EUEE WITH ANSWERS 2000-2011 E.C

🔰 Biology Grade 12 Worksheet

PHYSICS QUESTIONS

🔰 Choose the correct answer!
1. Which of the following wrong statement regarding projectile motion?
A. Horizontal Velocity is constant.
B. The effect of air resistance is negligible.
C. Horizontal and vertical components of projectile motion dependant each other.
D. Free fall acceleration is constant.
2. In vertical projectile motion:
A. Acceleration is remain constant.
B. Velocity is constant.
C. Acceleration is zero.
D. All are correct.
3. Kepler's second law is state the law conservation of:
A. Energy
B. Linear momentum.
C. Angular momentum
D. Kinetic energy
4. Kepler's third also known as the laws of:____
A. Ellipse
B. Equal areas
C. Harmonies
D. Energy.
5. Which one is not correct about kepler's third law?
A. Planet closest to sun have faster speed.
B. Square orbital period directly proportional to the cube radius of orbit.
C. Describe the motion of single planet.
D. The ratio of oribital period to radius of orbit is constant.
6. The attraction force between two masses directly proportional to the product of masses and inversely proportional the square of distance b/n them. This law is__
A. Kepler's first law
B. Newton law of universal gravitation.
C. Pascal's principle
D. Omhs law.
7. The maximum height of trajectory occurs when:
A. Horizontal Velocity is constant.
B. Vertical velocity is constant
C. Vertical velocity is zero.
D. Acceleration is zero.
8. Moment inertia of object depends on:
A. The axis of rotation
B. Shape of body
C. Mass of body
D. None.
9. Which one is correct about inclined projectile motion?
A. Vertical component of Velocity is constant.
B. Acceleration in horizontal motion.
C. There is no force acting in horizontal direction.
D. Horizontal Velocity is changed with time.
10. Rotational effect of force is called____
A. Mass
B. Force
C. Torque.
D. Acceleration


ANSWER
1. C
2. A
3. C
4. C
5. C
6. B
7. C
8. D
9. C
10. C

BIOLOGY QUESTIONS FOR GRADE FROM UNIT_2
MICROORGANISMS.

1. Which of the following branch of biology study about microbes?
A. Anatomy
B. Virology
C. Microbiology
D. Zoology
2. Which of the following not characteristics of Eubacteria?
A. They have great variation in mode of nutrition.
B. the lack true chlorophyll
C. Have both DNA and RNA
D. Unicellular and eukaryotic microorganisms.
3. Which of the following unicellular eukaryotic microorganisms?
A. Bacteria
B. Virus
C. Fungi
D. Protozoa
4. All external structure of bacteria EXCEPT?
A. Flagella
B. Cell wall
C. Pill
D. Endospore
5. All groups of bacterial shapes is....
A. Bacilli, Cocci, Circle, tetrahedral
B. Cocci, Circle, Triangle,Comma
C. Comma, Bacilli, Cocci, Spirochetes
D. All are correct.
6. Which of the following rod shaped bacteria?
A. Comma
B. Cocci
C. Bacilli
D. Spirochetes
7. Bacteria can be classified Gram positive and Gram negative based on__
A. Shape
B. Structure of bacteria
C. Cell wall composition
D. Size of bacteria
8. Gram positive bacteria is differ from Gram negative bacteria.
Gram positive bacteria is____
A. Lose crystal violet stain
B. More permeable of molecules
C. has thin peptidoglycan.
D. has outer membrane.
9. Consider the following steps
1. iodine treatment
2. Decolonization
3. Fixation
4. Crystal violet
5. Counter stain safranin
Which of the following correct steps of Gram staining?
A. 3, 4,1, 5, 2
B. 3, 5, 4, 1, 2
C. 3, 4, 1, 2, 5
D. 3, 1, 4, 5, 2
10. All are characteristics of true bacteria one is not?
A. Have cell wall made from peptidoglycan.
B. Have genetic material
C. Found in everywhere.
D. They are Eukaryotic unicellular organisms.

Biology questions for grade 12 students from grade 11 unit-2 Animals.
Choose the best answer
1. Which of the following is a characteristic unique to animals?
A) Photosynthesis
B) Multicellularity
C) Heterotrophy
D) Cell walls

2. What type of body symmetry do most animals exhibit?
A) Asymmetry
B) Radial symmetry
C) Bilateral symmetry
D) Spherical symmetry

3. Which of the following is a common characteristic of mammals?
A) Feathers
B) Scales
C) Mammary glands
D) Gills
4. Which of the following groups is considered invertebrates?
A) Fish
B) Amphibians
C) Arthropods
D) Reptiles

5. What is the primary feature that distinguishes vertebrates from invertebrates?
A) Presence of a backbone
B) Ability to reproduce sexually
C) Presence of legs
D) Ability to fly

6. Which of the following is an example of an echinoderm?
A) Squid
B) Starfish
C) Octopus
D) Crab

7. What type of reproduction involves the development of an embryo from an unfertilized egg?
A) Sexual reproduction
B) Asexual reproduction
C) Parthenogenesis
D) Budding

8. In which type of reproduction do offspring develop from a single parent without fertilization?
A) Sexual reproduction
B) Asexual reproduction
C) Fragmentation
D) Sexual dimorphism

9. Which reproductive strategy involves laying eggs outside the body?
A) Oviparity
B) Viviparity
C) Ovoviviparity
D) Asexual reproduction

10. Which insect is primarily responsible for pollination in many crops?
A) Mosquito
B) Butterfly
C) Ant
D) Beetle

11. What is the role of honeybees in agriculture?
A) Pest control
B) Pollination
C) Soil aeration
D) Decomposition

12. Which insect is known for producing silk?
A) Termite
B) Silkworm
C) Grasshopper
D) Ladybug
13. What term describes the study of animal behavior?
A) Ethology
B) Ecology
C) Zoology
D) Physiology

14. Which behavior is characterized by a fixed action pattern in response to a specific stimulus?
A) Imprinting
B) Reflex action
C) Migration
D) Courtship behavior

15. What is the term for a behavior that increases an animal's chances of survival and reproduction?
A) Innate behavior
B) Learned behavior
C) Adaptive behavior
D) Social behavior
16. What is homeostasis?
A) The ability to reproduce
B) The maintenance of stable internal conditions
C) The ability to adapt to the environment
D) The process of evolution

17. Which organ system is primarily responsible for maintaining homeostasis in animals?
A) Digestive system
B) Nervous system
C) Endocrine system
D) Circulatory system

18. How do mammals regulate their body temperature?
A) Through behavioral adaptations only
B) By changing their color
C) Through physiological mechanisms like sweating or shivering
D) By migrating to different climates
19. Which of the following animals is known for its ability to hibernate?
A) Dolphin
B) Bear
C) Eagle
D) Shark

20. What type of animal is typically characterized by having a hydrostatic skeleton?
A) Arthropods
B) Mollusks
C) Annelids (earthworms, etc.)
D) Both B and C

21. Which animal is known for its complex vocalizations and social structures?
A) Wolf
B) Goldfish
C) Snail
D) Jellyfish

22. Which term describes animals that can maintain a constant body temperature regardless of environmental conditions?
A) Ectothermic
B) Endothermic
C) Poikilothermic
D) Homeothermic

23. What type of feeding strategy involves an organism consuming its own kind?
A) Herbivory
B) Carnivory
C) Cannibalism
D) Omnivory

24. Which animal group exhibits the most complex nervous systems?
A) Insects
B) Fish
C) Mammals
D) Reptiles

25. What is the primary function of pheromones in animals?
A) To aid in digestion
B) To attract mates or signal danger
C) To camouflage from predators
D) To regulate body temperature

26. Which animal is known for its ability to produce bioluminescence?
A) Firefly
B) Elephant
C) Tiger
D) Giraffe

27. What term describes the seasonal movement of animals from one region to another?
A) Migration
B) Hibernation
C) Estivation
D) Foraging

28. Which group of animals is known for having exoskeletons?
A) Mammals
B) Birds
C) Arthropods
D) Amphibians

29. What type of feeding mechanism do filter feeders use?
A) Grazing on plants
B) Catching prey with teeth
C) Straining food particles from water
D) Absorbing nutrients through skin

30. Which physiological process helps fish regulate their buoyancy in water?
A) Swim bladder adjustment
B) Gills respiration
C) Heart rate variation
D) Liver metabolism

The End!!

Prepared by Maths group11

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