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Course: Edexcel A Level Biology A (SNAB) 9BI0
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Curriculum

Edexcel A Level Biology A (SNAB) 9BI0

Topic 1 · Lifestyle, Health and Risk

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Topic 2 · Genes and Health

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Topic 3 · Voice of the Genome

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Topic 4 · Biodiversity and Natural Resources

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Topic 5 · On the Wild Side

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Topic 6 · Immunity, Infection and Forensics

0/41

Topic 7 · Run for your Life

0/55

Topic 8 · Grey Matter

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Quiz

4.2.5 Plant Fibres – Unit exam questions

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  • Questions count: 12
  • Passing grade: B+
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1.
IGCSE Biology 2.1 Animal and Plant Cells - Question 11
IGCSE Biology 2.1 Animal and Plant Cells - Question 11
A
B
C
D
2.
IGCSE Biology 1.3 Dna in Classification - Question 6
IGCSE Biology 1.3 Dna in Classification - Question 6
A
B
C
D
3.
IGCSE Biology 1.3 Dna in Classification - Question 8
IGCSE Biology 1.3 Dna in Classification - Question 8
A
B
C
D
4.
Which condition is required to keep the squirrel population of the previous question in Hardy-Weinberg equilibrium?
Which condition is required to keep the squirrel population of the previous question in Hardy-Weinberg equilibrium?
Random mating
Genetic drift
Mutation
Gene flow
5.
In the stem section, tissue X has lignified dead cells and tissue Y living cells with sieve plates. What are they?
Dr Dabour Hub Academy - figure 1
X phloem; Y xylem
Both xylem
X cuticle; Y stomata
X xylem; Y phloem
6.
IGCSE Biology 1.3 Dna in Classification - Question 4
IGCSE Biology 1.3 Dna in Classification - Question 4
A
B
C
D
7.
What would be the approximate frequency of the heterozygote if this population were in Hardy-Weinberg equilibrium? (see the figure)
What would be the approximate frequency of the heterozygote if this population were in Hardy-Weinberg equilibrium? (see the figure)
20 percent
45 percent
48 percent
72 percent
8.
Which technique is essential in plant tissue culture?
Open-air culture
Sterile (aseptic) technique to prevent microbial contamination
Using unsterilised tools
Adding soil to the medium
9.
Which property explains cooling by sweating?
High latent heat of vaporisation
Cohesion
Ice is less dense
Adhesion
10.
IGCSE Biology 2.1 Animal and Plant Cells - Question 12
IGCSE Biology 2.1 Animal and Plant Cells - Question 12
A
B
C
D
11.

B4.2 Ecological niches — Question 2 | DABOUR HUB

Dr Dabour Hub Academy - figure 2
A
B
C
D
12.
Compare: Quantity A is the speed of the response of Mimosa leaves to touch; Quantity B is the speed at which a stem bends toward light. Which is correct?
Quantity A is greater
Quantity B is greater
The two quantities are equal
The information given is insufficient
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Part of Topic 4 · Biodiversity and Natural Resources — see every lesson and quiz in this unit.
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