AimMent

For Class 8, 9 & 10

Foundation - a strong base in Physics, Chemistry, Maths & Biology

Concept-first questions with clear model answers across all four subjects, aligned to NCERT. Start early, build the habit, and walk into your board exams, NEET and JEE already ahead.

Class 824Class 924Class 1036
SubjectAllPhysics 19Chemistry 19Biology 19Mathematics 27
ChapterAllAtoms and MoleculesForce and Laws of MotionGravitationHeron's FormulaImprovement in Food ResourcesIs Matter Around Us PureLinear Equations in Two VariablesMatter in Our SurroundingsMotionNatural ResourcesNumber SystemsPolynomialsSoundStatisticsStructure of the AtomSurface Areas and VolumesThe Fundamental Unit of LifeTissuesWork and Energy

Showing 2 questions for Class 9. Tap a card to reveal the answer.

BiologyThe Fundamental Unit of Lifemedium

Give two differences between a prokaryotic and a eukaryotic cell.

Reveal answer ↓

What it is

Prokaryotes (bacteria) have no true nucleus; eukaryotes (plants, animals) have a nucleus and organelles.

Answer

A prokaryotic cell has no true nucleus - its genetic material lies free in the cytoplasm - and it lacks membrane-bound organelles like mitochondria; bacteria are examples. A eukaryotic cell has a true, membrane-bound nucleus and membrane-bound organelles; plant and animal cells are examples. Eukaryotic cells are usually larger and more complex.

  • •Prokaryote: no true nucleus, no membrane-bound organelles (bacteria)
  • •Eukaryote: true nucleus + organelles (plants, animals)
  • •Eukaryotic cells are larger and more complex

Why learn this

It's the deepest divide in the living world and why antibiotics can hit bacteria but not your own cells.

💡 Memory trick

PRO = primitive, NO true nucleus; EU = 'true', good nucleus.

BiologyThe Fundamental Unit of Lifemedium

What is osmosis? What happens to a cell placed in pure water?

Reveal answer ↓

What it is

Osmosis is water moving across a membrane to balance the concentration on both sides.

Answer

Osmosis is the movement of water molecules through a selectively permeable membrane from a region of higher water concentration to a region of lower water concentration. A cell placed in pure water (a hypotonic solution) gains water by osmosis and swells; an animal cell may even burst, while a plant cell becomes firm (turgid) because of its cell wall.

  • •Water moves across a selectively permeable membrane
  • •From higher to lower water concentration
  • •In pure water a cell swells (animal may burst; plant turns turgid)

Why learn this

It's how roots absorb water, how our cells stay hydrated and why salt preserves food.

💡 Memory trick

Water follows the salt. Cell in pure water swells; in salty water it shrinks.