Science MCQs

Practice multiple choice questions with instant feedback. Select an option to see if you're correct.

Total Questions
2100
Page 25 of 210
Question 241 Medium

What is the main function of stomata?

A
Food storage
B
Water absorption
C
Gas exchange
D
Support
Question 242 Medium

Which element is needed for protein synthesis in plants?

A
Magnesium
B
Nitrogen
C
Calcium
D
Iron
Question 243 Medium

What is the role of transpiration pull?

A
Push water down
B
Pull water up
C
Store water
D
Absorb minerals
Question 244 Medium

Which cells are dead in vascular tissue?

A
Sieve tubes
B
Companion cells
C
Xylem vessels
D
Phloem parenchyma
Question 245 Medium

What is the effect of wind on transpiration?

A
Decreases
B
Increases
C
No effect
D
Stops
Question 246 Medium

Where are root hairs located?

A
Root cap
B
Region of maturation
C
Region of elongation
D
Meristematic zone
Question 247 Medium

Which process is the reverse of photosynthesis?

A
Respiration
B
Transpiration
C
Translocation
D
Capillary action
Question 248 Hard

What is the function of the cuticle on leaves?

A
Gas exchange
B
Water retention
C
Light absorption
D
Support
Question 249 Hard

Which tissue provides storage and support in plants?

A
Parenchyma
B
Collenchyma
C
Sclerenchyma
D
Meristem
Question 250 Hard

How does temperature affect transpiration?

A
Low temperature increases it
B
High temperature decreases it
C
High temperature increases it
D
No effect
Showing 241-250 of 2100 questions

Quick Stats

Total Questions 10900
easy 5797
medium 2983
hard 2120

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