WorksheetsPaper 2 Maths
Total questions: 20
Worksheet time: 10mins
Given the following data for a plant community: total energy fixed by photosynthesis is 10,000 kJ m −2 year −1 , and energy used in plant respiration is 4,000 kJ m −2 year −1 . What is the gross primary productivity (GPP) of the community?
4,000 kJ m −2 year −1
10,000 kJ m −2 year −1
6,000 kJ m −2 year −1
14,000 kJ m −2 year −1
If the net productivity of a producer is 2,500 kJ m −2 year −1 and the gross productivity is 4,000 kJ m −2 year −1 , what is the energy lost to respiration?
1,500 kJ m −2 year −1
6,500 kJ m −2 year −1
2,500 kJ m −2 year −1
4,000 kJ m −2 year −1
Which of the following is the correct unit for gross primary productivity?
kJ m −2 year −1
kg m −3 s −1
J s −1
mol L −1
If a consumer ingests 1,000 kJ and assimilates 400 kJ, what is the efficiency of energy transfer from ingestion to assimilation?
25%
40%
60%
75%
A crop yields 2,000 kg per acre. If the theoretical maximum yield is 2,500 kg per acre, what is the percentage yield?
80%
125%
20%
50%
If a person’s heart rate (R) is 70 beats per minute and their stroke volume (V) is 75 mL, what is their cardiac output (CO)?
5,250 mL per minute
1,050 mL per minute
145 mL per minute
525 mL per minute
The refractory period of a neurone is 2 ms. What is the maximum frequency of impulse conduction?
500 Hz
2 Hz
50 Hz
5,000 Hz
In a monohybrid cross between two heterozygous individuals (Aa × Aa), what is the expected phenotypic ratio?
1:1
3:1
2:1
1:2:1
In a dihybrid cross between two individuals heterozygous for both genes (AaBb × AaBb), what is the expected phenotypic ratio?
9:3:3:1
1:1:1:1
3:1
1:2:1
What is the probability of obtaining a homozygous recessive offspring from a cross between two heterozygous parents (Aa × Aa)?
1/2
1/4
3/4
1/8
Which statistical test is most appropriate for determining if the difference between observed and expected phenotypic ratios is significant?
Student’s t-test
Chi squared test
Mann-Whitney U test
ANOVA
If the frequency of allele A in a population is 0.7, what is the expected frequency of genotype AA under Hardy–Weinberg equilibrium?
0.49
0.21
0.09
0.42
Given a population where 16% of individuals show a recessive phenotype, what is the frequency of the dominant allele (A) under Hardy–Weinberg equilibrium?
0.2
0.4
0.6
0.8
Which of the following best describes genetic drift?
Change in allele frequency due to natural selection
Random change in allele frequency in a small population
Change in genotype frequency due to mutation
Increase in genetic variation due to migration
Which sampling method is most appropriate for studying genetic drift in a small, isolated population?
Random sampling
Systematic sampling
Stratified sampling
Cluster sampling
Why is a logarithmic scale often used to represent the growth of a population of microorganisms?
Because population growth is always linear
To make it easier to compare small and large values
To exaggerate small differences
Because it is required by law
If a population of bacteria doubles every hour, how many bacteria will there be after 5 hours if you start with 100?
200
1,600
3,200
3,200,000
Which of the following is NOT an appropriate unit for cardiac output?
mL per minute
L per minute
m 3 per second
ounces per minute
If the observed phenotypic ratio in a cross is significantly different from the expected ratio, what does this suggest?
The inheritance follows Mendelian ratios
There may be other factors affecting inheritance
The data are always incorrect
The sample size is too large
Which of the following best describes net productivity in an ecosystem?
Total energy fixed by producers
Energy remaining after respiration losses
Energy lost as heat
Energy consumed by decomposers
