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

• Carolus Linnaeus gave the artificial system of classification. 
• He classified plants mainly based on the number and arrangement of stamens.
• known as the "Father of Taxonomy

Last updated question 17-02-2026

Explanation

Lithium (Li) and Magnesium (Mg), Magnesium (Mg) and Aluminium (Al) show a diagonal relationship in the periodic table

Where elements in adjacent groups and periods have similar properties.

Explanation

They have the general formula R−O−R′,

Where R and R′ represent the organyl groups.

Additional information

• R-CO-R: Ketones
• R-OH: Alcohols
• R-CHO: Aldehydes

Last updated question 17-02-2026

Explanation

• Epiphytes grow on other plants.
• They are not parasitic.
• They obtain nutrients from air and rain.
• Common in tropical forests.
• Orchids are common epiphytes.

Explanation

The region in a bacterial cell where the DNA is concentrated is called the nucleoid. 

Structure:

• It is an irregularly shaped region within the cytoplasm 
• Unlike eukaryotic cells, this region is not enclosed by a membrane.

Explanation

Explanation

The primary characteristic of local populations in the same area 

That they are conspecific—meaning they belong to the same species

Same species—and share a defined, contiguous geographic area,

Where they are more likely to interbreed with each other than with individuals from other areas

Last updated 17-02-2026

Explanation

Picric acid is also called 2,4,6-trinitrophenol.

It has three nitro (–NO₂) groups attached to a benzene ring with one hydroxyl (–OH) group.

     NO2

      |

 NO2—C6H2—OH

      |

     NO2

Explanation

Both gymnosperms and angiosperms are seed-producing plants (seed plants).

• Gymnosperms → Seeds are naked (not enclosed in fruit).

• Angiosperms → Seeds are enclosed within fruit.

Thus, they are correlated based on the characteristic of seed production.

Last updated 17-02-2026