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Biology Class 9

Why is the plasma membrane called selectively permeable?

What does it allow and what does it block?

uniboardhub
Asked on 06/02/2026
104 views
1 answers 50 votes
Biology Class 9

Genetic manipulation

What is genetic manipulation?

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Asked on 06/02/2026
104 views
1 answers 50 votes
Biology Class 9

What happens when a cell is placed in pure water?

Why do plant cells swell but don’t burst?

uniboardhub
Asked on 06/02/2026
104 views
1 answers 50 votes
Biology Class 9

Crop yield factors

Name factors affecting crop yield.

uniboardhub
Asked on 06/02/2026
104 views
1 answers 50 votes
Biology Class 9

Why do animal cells burst in pure water?

What’s missing in animal cells?

uniboardhub
Asked on 06/02/2026
104 views
1 answers 50 votes
Biology Class 9

Manure definition

What is manure?

uniboardhub
Asked on 06/02/2026
104 views
1 answers 50 votes
Biology Class 9

What is diffusion and why is it important for cells?

How do gases move in and out without energy?

uniboardhub
Asked on 06/02/2026
104 views
1 answers 50 votes
Biology Class 9

Advantages of manure

State one advantage of manure.

uniboardhub
Asked on 06/02/2026
104 views
1 answers 50 votes
Biology Class 9

What role does the nucleus play in the cell?

Is the nucleus really the “brain” of the cell?

uniboardhub
Asked on 06/02/2026
104 views
1 answers 50 votes
Biology Class 9

Fertilizers

What are fertilizers?

uniboardhub
Asked on 06/02/2026
105 views
1 answers 50 votes
Biology Class 9

Why do red blood cells lack a nucleus?

Isn’t the nucleus important?

uniboardhub
Asked on 06/02/2026
106 views
1 answers 50 votes
Biology Class 9

Manure vs fertilizer

Differentiate between manure and fertilizers.

uniboardhub
Asked on 06/02/2026
104 views
1 answers 50 votes
Biology Class 9

What is cytoplasm and why is it important?

Is cytoplasm just “cell liquid”?

uniboardhub
Asked on 06/02/2026
104 views
1 answers 50 votes
Biology Class 9

Irrigation meaning

What is irrigation?

uniboardhub
Asked on 06/02/2026
104 views
1 answers 50 votes
Biology Class 9

What is the function of mitochondria?

Why are mitochondria called the powerhouse of the cell?

uniboardhub
Asked on 06/02/2026
104 views
1 answers 50 votes

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