Explanation

• Protists are simple, mostly unicellular organisms.
• Algae show plant-like characteristics among protists.
• They contain chlorophyll for making food.
• They produce their own food through photosynthesis.
• That is why they are called plant-like protists.

Last verified on 10-04-2026

Explanation

• During the day, plants perform photosynthesis, absorbing carbon dioxide and releasing oxygen.
• At night, in the absence of sunlight, they undergo respiration, where they take in oxygen and release carbon dioxide.

Last verified on 02-04-2026

Explanation

• Stomata are tiny pores on the surface of leaves that allow gas exchange (CO₂ in, O₂ out).
• They play a key role in photosynthesis and transpiration.
• Number per leaf: Thousands, varies by plant

Last verified on 19-03-2026

Explanation

• Leaves are called the food factory of plants.
• They prepare food through the process of Photosynthesis.
• Chlorophyll in leaves absorbs sunlight to make food.
• Photosynthesis uses Carbon dioxide (CO₂), Water (H₂O), and Sunlight.
• Food produced is mainly Glucose, which provides energy to the plant.

Last verified on 13-03-2026

Explanation

• Photosynthesis is the process by which green plants, algae, and some bacteria convert sunlight, water, and carbon dioxide into food (glucose).
• It occurs in the chloroplasts of plant cells using chlorophyll.
• The byproduct of this process is oxygen, which is released into the atmosphere.

Last verified on 10-03-2026

Explanation

• Cell membrane contains phospholipids, proteins, and glycoproteins.
• Glycoproteins form a sticky outer layer (glycocalyx).
• This layer slows the movement of molecules across the membrane.
• Glycolipids also reduce diffusion slightly, but less than glycoproteins.
• Glycerol does not affect cell diffusibility significantly.

Last updated question 17-02-2026

Explanation

Amaranthaceae is a family of flowering plants (e.g., Amaranthus).

Flowers are usually small and inconspicuous.

Petals are absent in most species; flowers are apetalous.

Sepals are present and protect the flower.

Leaves and stems are present as normal vegetative structures.

Last updated question 17-02-2026

Explanation

• Cholesterol functions as a "fluidity buffer"
• The cell membrane is made of a phospholipid bilayer.
• Cholesterol is present between phospholipid molecules.
• It maintains membrane fluidity and flexibility.

Last updated question 17-02-2026

Explanation

• The cell membrane is made of a phospholipid bilayer.
• Cholesterol is embedded between phospholipids.
• It regulates membrane fluidity at different temperatures.
• It prevents the membrane from becoming too rigid in cold conditions.
• It also prevents excessive fluidity in high temperature, maintaining stability.

Last updated question 17-02-2026

Explanation

Taiga, also called boreal forest, occurs in high northern latitudes.

Characterized by long, cold winters and short, mild summers.

Snow cover persists for much of the year.

Dominated by coniferous trees like pine, spruce, and fir.

Adapted for cold climate with needle-like leaves and conical shape to shed snow.