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Class 9 Biology Tests

Opening and Closing of Stomata MCQ Quiz PDF Download

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Class 9 Biology: Opening and Closing of Stomata MCQs PDF Download

MCQ: During the day, the plants keep their

A) stomata opens
B) stomata closed
C) phloem blocked
D) xylem blocked

MCQ: The inner side of guard cells is

A) rough
B) straight
C) concave
D) convex

MCQ: The outer side of guard cells is

A) concave
B) convex
C) rough
D) none of above

MCQ: The number of guard cells of the stoma is

A) ten
B) two
C) four
D) eight

MCQ: The ions that flow back to guard cells, from epidermal cells at the end of the day are

A) potassium ions
B) magnesium ions
C) phosphorus ions
D) Sulphur ions

Practice Tests: Class 9 Biology Exam Prep

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9th Grade Biology App (Android & iOS)

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9th Grade Biology App (Android & iOS)

9th Grade Biology App Download

O Level Biology App (Android & iOS)

O Level Biology Quiz App

10th Grade Biology App (Android & iOS)

10th Grade Biology Quiz App