Practice questions
Q1Which statement best explains why green plants are called autotrophs?
A They move from one place to another to search for food.
B They prepare food from simple substances using light energy.
C They obtain ready-made food only from dead organisms.
D They depend on animals for carbohydrates.
Explanation Autotrophs make their own food from simple substances; in green plants this happens by photosynthesis. Movement, feeding on dead matter, or depending on animals does not explain autotrophy.
Q2Why is cell division included in the RBSE Living Being block?
A It explains growth, repair and continuity of life at basic level
B It requires memorising all stages of mitosis in detail
C It proves that only animals grow by cells
D It replaces nutrition and respiration in the syllabus
Explanation The exam-level link is simple: cells divide so organisms can grow, repair and continue life. A teacher should avoid turning the topic into detailed senior-secondary cell-cycle memorisation.
Q3Imran says, “Roots make food because they are in soil.” What should the teacher say first?
A Roots make food and leaves only store it
B Roots absorb water and minerals; green leaves make food
C Soil directly becomes sugar inside the root
D Only flowers can make food in plants
Explanation Imran’s misconception is common because roots touch soil. The teacher should preserve the observation but correct the function: roots absorb water and minerals, while green leaves make food under suitable light conditions.
Q4A learner writes the following sequence for frog development. Which sequence best shows metamorphosis?
A Adult frog -> egg -> tadpole
B Tadpole -> egg -> adult frog
C Egg -> adult frog -> tadpole
D Egg -> tadpole -> adult frog
Explanation In frog metamorphosis, the egg develops into a tadpole, and the tadpole later changes into the adult frog. The other sequences put the egg, larval stage, or adult stage in the wrong order.
Q5In a Class 7 lesson, a teacher gives cards for algae, gram plant, cow and butterfly and asks learners to group them first by food-making ability. Which grouping best supports the idea of autotrophs and heterotrophs?
A Algae and gram plant together; cow and butterfly together
B Cow and gram plant together; algae and butterfly together
C Butterfly and gram plant together; algae and cow together
D All four in one group because all are living things
Explanation For a nutrition-based grouping, algae and a gram plant belong together because they can make food, while a cow and a butterfly obtain food from other organisms. Grouping all living things together does not test the autotroph-heterotroph distinction.
More questions
6Which statement best explains why a green plant is called an autotroph?
AIt prepares its own food from simple substances.
BIt moves from one place to another to search for food.
CIt obtains food only by eating other living organisms.
DIt removes waste substances from its body.
7Match the structure with the best function: I Root, II Leaf, III Chloroplast, IV Cell wall.
AI-support only, II-reproduction only, III-waste removal, IV-gas exchange
BI-water-mineral absorption, II-food-making site, III-chlorophyll support, IV-rigid outer support
CI-food-making, II-water absorption, III-animal movement, IV-nucleus control
DI-cell division, II-cell membrane, III-root hair, IV-respiration only
8A student groups neem and algae together, but keeps mushroom in a different group. Which reason is scientifically strongest?
AMushroom has no need for food.
BMushroom does not make food like green plants with chlorophyll.
CMushroom is placed separately because it grows in soil.
DMushroom is placed separately because it cannot reproduce.
9Which statement correctly compares a basic plant cell and animal cell for REET Level 2?
ABoth have chloroplasts and cell walls
BAnimal cells have chloroplasts, plant cells do not
CPlant cells usually have cell wall and chloroplasts; animal cells do not
DOnly animal cells have a nucleus
10A Class 7 student says, "Plants breathe only at night because they make food in sunlight." What should the teacher clarify first?
APlants respire all the time, while photosynthesis needs light and chlorophyll.
BPlants respire only when there is no sunlight.
CPhotosynthesis and respiration are exactly the same process in plants.
DPlants do not need respiration because they prepare their own food.
11Which pair is correctly matched?
ARespiration - movement of air in and out of the body
BExcretion - removal of metabolic wastes from the body
CPhotosynthesis - breakdown of food to release energy
DHeterotroph - organism that prepares its own food
12Consider the following statements about metamorphosis. I. It is a drastic change from larva to adult. II. A frog changing from tadpole to adult is an example. Which option is correct?
AOnly statement I is correct.
BOnly statement II is correct.
CBoth statements I and II are correct.
DNeither statement I nor statement II is correct.
13Which statement set keeps the topic inside the REET Level 2 living-world boundary?
AStudy plant parts, nutrition, respiration, excretion, cells and cell division; avoid full senior taxonomy
BIgnore cells because they are always Class 11 biology
CReplace the topic with only human adolescence and hormones
DPrepare only Latin names of plant and animal kingdoms
14Which statement is incorrect about energy release in living organisms?
ACells need energy for life processes such as growth and movement.
BRespiration releases energy from food inside cells.
CBreathing itself breaks down food inside every cell.
DPlants and animals both need respiration for energy.
15A student says, "Animals do not need plants because many animals eat other animals." Which explanation is scientifically sound?
ACarnivores prepare food by photosynthesis inside their bodies.
BAnimals depend on plants directly or indirectly because plants are food makers.
COnly herbivores depend on plants; carnivores are completely independent.
DPlants depend on animals for all their food, so animals are the main producers.
