1. Theory of natural selection was proposed by ?
[A] Mendel
[B] Darwin
[C] Lamarck
[D] Karl Landsteiner
Show Answer
Correct Answer: B [Darwin]
Notes:
Theory of natural selection was proposed by Darwin.The theory is an explanation for adaptation and speciation. He defined natural selection as the “principle by which each slight variation [of a trait], if useful, is preserved”.
2. The Chlorophyll cells within the plant leaves are perfectly optimized to absorb which of the following waves of the Sun Light?
[A] Green
[B] Red & Blue
[C] Red & Yellow
[D] Yellow and Blue
Show Answer
Correct Answer: B [Red & Blue]
Notes:
The Chlorophyll cells within the plant leaves are perfectly optimized to absorb red and blue waves of the Sun Light. Chlorophyll is concentrated within organisms in structures called chloroplasts.
3. The human musculoskeletal system consists of
[A] human skeleton
[B] bones attached to other bones with joints
[C] skeletal muscle attached to the skeleton by tendons.
[D] All the above
Show Answer
Correct Answer: D [All the above]
Notes:
The human musculoskeletal system consists of human skeleton, bones attached to other bones with joints and skeletal muscle attached to the skeleton by tendons. It permits movement of the body, maintains posture and circulates blood throughout the body.
4. Which among the following is the correct meaning of Phyllotaxy?
[A] Classification of plants as per the leaves structure
[B] The manner of arrangement of leaves in stem or branch
[C] The manner the leaves fall from the branches
[D] The anatomy of leaves in angiosperms
Show Answer
Correct Answer: B [The manner of arrangement of leaves in stem or branch]
Notes:
Phyllotaxy means the manner of arrangement of leaves in stem or branch. It is the arrangement of leaves on a plant stem. Phyllotactic spirals usually form a distinctive class of patterns in nature.
5. Which process enables the Peepal tree to release oxygen at night?
[A] Crassulacean Acid Metabolism
[B] C3 Photosynthesis
[C] C4 Photosynthesis
[D] Carbon cycle re-balancing
Show Answer
Correct Answer: A [Crassulacean Acid Metabolism]
Notes:
The Peepal tree uses Crassulacean Acid Metabolism (CAM) photosynthesis, allowing CO₂ uptake at night and oxygen release, a trait seen in some succulents and epiphytes to minimize water loss. CAM enables the Peepal to continue gas exchange during the night, unlike typical C3 or C4 plants.
6. The greatest degree of genetic variability would be expected among organisms that reproduce via__?
[A] Budding
[B] Sporulation
[C] Sexual Recombination
[D] Vegetative Propagation
Show Answer
Correct Answer: C [ Sexual Recombination]
Notes:
Genetic variability is usually due to a mutation during meiosis (sexual reproduction). In the above question, the answer choices (B) and (D) are examples of asexual reproduction. They create identical offspring.
7. In which among the following plants, seeds germinate and seedlings grow while still attached to their mother plant?
[A] Onion
[B] Rhizophora
[C] Sheesham
[D] Cycas
Show Answer
Correct Answer: B [ Rhizophora]
Notes:
The phenomenon is found in Mangrove Plants and is known as Vivipary and Rhizophora belongs to that category.
8. Which of the following organelle carries on the process of cell respiration?
[A] Mitochondria
[B] Endoplasmic reticulum
[C] Golgi body
[D] Lysosomes
Show Answer
Correct Answer: A [ Mitochondria]
Notes:
Mitochondrion carries on the process of cell respiration converting glucose to ATP energy the cell can use. An organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. It has a double membrane, the inner part being folded inwards to form layers.
9. Which of the following fruits has its seed outside?
[A] Mango
[B] Banana
[C] Strawberry
[D] Orange
Show Answer
Correct Answer: C [Strawberry]
Notes:
Strawberry is the fruit which has its seeds outside the body. The “seeds” on the outside of a strawberry are actually the plant’s ovaries and are called “achenes.” Each “seed” is technically a separate fruit that has a seed inside of it.
10. Which vitamin protects us from Pellagra disease?
[A] Vitamin B5
[B] Vitamin B7
[C] Vitamin B3
[D] None of the above
Show Answer
Correct Answer: C [Vitamin B3]
Notes:
Vitamin B3 protects us from Pellagra disease. Vitamin B-3 is important for a healthy body and may help to slow the progression of heart disease, diabetes, etc. It aids your metabolism and nervous system.
