ACME ACADEMY

WEEKLY EVALUATION TEST

Subject: Science
Time Limit: 20 Mins
Max Marks: 20 Marks
Student Name:
Roll Number:
Class / Sec:
Date:

GENERAL INSTRUCTIONS:

  1. All questions are compulsory. Carefully read all instructions before starting.
  2. The question paper contains 20 questions.
  3. There is no negative marking for incorrect answers.
  4. Use of mobile phones, smartwatches, or calculators is strictly prohibited during the exam.
1. Which of the following organisms reproduces asexually by forming small outgrowths called buds that eventually separate to live independently?
[1 Mark]
(A) Humans
(B) Mango tree
(C) Hydra
(D) Amoeba
2. What is the fundamental difference between asexual and sexual reproduction?
[1 Mark]
(A) Asexual reproduction requires two parents, while sexual requires one.
(B) Asexual reproduction produces genetically identical offspring (clones), while sexual reproduction creates genetic variation.
(C) Asexual reproduction involves meiosis, while sexual reproduction relies on mitosis.
(D) Asexual reproduction only occurs in animals, while sexual reproduction occurs only in plants.
3. In flowering plants, the transfer of pollen grains from the anther to the stigma is termed:
[1 Mark]
(A) Fertilisation
(B) Germination
(C) Pollination
(D) Ovulation
4. Which specific part of a flower develops into a fruit after successful fertilisation?
[1 Mark]
(A) Ovule
(B) Ovary
(C) Stigma
(D) Petal
5. What is the primary role of the testes in the human male reproductive system?
[1 Mark]
(A) To nourish a developing embryo.
(B) To produce sperm and male hormones like testosterone.
(C) To produce eggs (ova).
(D) To act as a passage for urine only.
6. How does the process of meiosis solve the problem of doubling chromosomes during sexual reproduction?
[1 Mark]
(A) It destroys half the chromosomes permanently.
(B) It reduces the chromosome number in the gametes (sperm and egg) to half the original diploid number.
(C) It doubles the size of the chromosomes to accommodate more DNA.
(D) It prevents the sperm and egg from actually fusing.
7. In agriculture, farmers often use techniques like cutting, grafting, and layering. What is the primary biological advantage of these vegetative propagation methods?
[1 Mark]
(A) They produce completely new, unknown varieties of plants.
(B) They allow plants to grow without any water.
(C) They produce new plants that are genetically identical to the parent, preserving desired traits quickly.
(D) They force plants to undergo rapid meiosis.
8. What happens in the female human body if the released egg is not fertilised?
[1 Mark]
(A) The egg travels back into the ovary.
(B) The thick, blood-rich inner lining of the uterus sheds and is expelled from the body.
(C) The uterus permanently stops producing eggs.
(D) The egg develops into a clone of the female.
9. Which of the following flowers is most likely adapted for wind pollination?
[1 Mark]
(A) A bright red flower with a strong, sweet fragrance and sticky pollen.
(B) A large flower that blooms at night with abundant nectar.
(C) A flower with small, light pollen produced in huge numbers and feathery stigmas.
(D) A flower completely enclosed within a hard shell.
10. Frogs and fish often lay thousands of eggs in water, while humans typically have one baby at a time. Why is this difference necessary?
[1 Mark]
(A) Water provides unlimited nutrients for thousands of embryos to thrive.
(B) Frogs use internal fertilisation, which requires more eggs.
(C) External fertilisation in water has a very low survival rate due to predators and currents, so laying thousands of eggs ensures a few survive.
(D) Humans lack the physical space to carry more than one gamete.
11. After fertilisation in humans, where does the newly formed zygote implant to receive nourishment and develop into a foetus?
[1 Mark]
(A) The ovary
(B) The fallopian tube (oviduct)
(C) The cervix
(D) The inner lining of the uterus
12. Louis Pasteur's experiments were significant because they proved that:
[1 Mark]
(A) Life arises spontaneously from dead matter.
(B) Fungi only grow on bread.
(C) New life always comes from pre-existing life (cell theory).
(D) Bacteria cannot cause diseases.
13. Assertion (A): A child receives exactly the same combination of chromosomes as their sibling. Reason (R): Meiosis randomly mixes genetic traits when forming gametes.
[1 Mark]
(A) Both A and R are true, and R is the correct explanation of A.
(B) Both A and R are true, but R is not the correct explanation of A.
(C) A is true, but R is false.
(D) A is false, but R is true.
14. In plant grafting, what happens to the genetic identity of the scion (the stem attached) and the stock (the rooted plant)?
[1 Mark]
(A) They mix their DNA to form a hybrid seed.
(B) The scion retains its own genetic traits (like fruit type), but relies on the stock's root system for support and water.
(C) The stock completely alters the genetics of the scion.
(D) Both plants die and sprout a new seed.
15. Which contraceptive method acts as a physical barrier to prevent sperm from reaching the egg while also protecting against Sexually Transmitted Infections (STIs)?
[1 Mark]
(A) Oral contraceptive pills
(B) Condoms
(C) Copper-T (IUD)
(D) Surgical blocking of fallopian tubes
16. During which trimester of human pregnancy does the fertilised egg develop into an embryo and begin forming major organs?
[1 Mark]
(A) First trimester
(B) Second trimester
(C) Third trimester
(D) It only happens after birth.
17. In a laboratory experiment, a student removes the stamens from a flower bud and covers it with a muslin bag. What is the most likely outcome?
[1 Mark]
(A) The flower will self-pollinate.
(B) The flower will die immediately.
(C) The flower will not develop into a fruit because no pollination can occur.
(D) The flower will miraculously produce seeds without pollen.
18. If a human gamete (sperm or egg) contains 23 chromosomes, how many chromosomes does a regular human skin cell contain?
[1 Mark]
(A) 23
(B) 46
(C) 92
(D) 12
19. Why is prenatal sex determination strictly prohibited by law in India?
[1 Mark]
(A) Because it requires dangerous radiation.
(B) Because it is highly inaccurate.
(C) To prevent the practice of self-selective abortion, which creates a severe imbalance in the societal sex ratio.
(D) Because it harms the developing foetus directly.
20. Fungi like Rhizopus reproduce rapidly by forming millions of tiny, lightweight structures that float in the air. What are these structures called?
[1 Mark]
(A) Seeds
(B) Gametes
(C) Buds
(D) Spores
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