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WorksheetsELS 4th quarter review
Total questions: 20
Worksheet time: 8mins
When is the first strong evidence of life in the fossil record?
3.5 thousand years ago
3.5 million years ago
3.5 billion years ago
3.5 trillion years ago
Which famous experiment in 1953 showed that organic molecules can form from non-living chemicals?
Miller-Urey experiment
Harold-Oparin experiment
Darwin-Miller experiment
Harold-Urey experiment
Which of the following questions on the origin of life can be scientifically tested?
Why are there organic molecules on meteorites?
Did complex molecules form with a purpose?
Can organic molecules form from inorganic chemicals?
The RNA world hypothesis is supported by which two evidences? Tick two.
RNA can capture light energy from the Sun.
RNA can encode genetic information.
RNA can catalyze/speed up chemical reactions.
RNA can form a protective layer/membrane.
How many chromosomes does a typical human body cell have?
23
46
69
92
Which cell in the human body has 23 chromosomes (haploid)?
gametes
nerve cells
mitochondria
red blood cell
Which statement is CORRECT?
A gene is a section of an allele.
A gene is a version of an allele.
An allele is a section of a gene.
An allele is a version of a gene.
For eye color, B is brown while b is blue.
Which of the following is heterozygous?
BB
bb
Bb
In leaf shape, E is lobed while e is non-lobed.
What is the phenotype of an individual with the ee genotype?
leaf shape
lobed
non-lobed
dominant non-lobed
Which of the following traits is an example of discontinuous variation?
height
tongue rolling
hand span
hip size
Which human phenotype is affected by genes only?
blood group
skin color
growth rate
hair style
Which is an adaptation of a polar bear?
snow
sharp claws
cold climate
seal
What is required in natural selection? Tick all that apply.
struggle for survival
variation
selection of beneficial traits
breeding of domestic animals
The diagram shows a food chain.
What is role of the snake? Tick all that apply.
primary consumer
secondary consumer
predator
prey
tertiary consumer
Which phase in a sigmoid population curve is the reproductive rate greater than the death rate? Tick all that apply.
lag phase
exponential phase
stationary phase
death phase
Which may cause a decrease in human population?
High infant mortality.
Low infant mortality.
High birth rate.
Low death rate.
The diagram show a sigmoid population growth curve.
Which numbered phase is the birth rate equal to the death rate?
1
2
3
4
Which does NOT limit population growth?
competition
predator-prey relationships
sigmoid curve
abiotic factors
Which statement explains how better education may result in a lower birth rate?
Women can focus more on their career.
Modern agriculture is less labor intensive.
Raising a family in the city is too expensive.
Being educated means less time for the family.
For tongue rolling, T is a tongue roller while t is a non-roller.
What is the chance of having a tongue roller offspring from two heterozygous dominant parents?
25%
50%
75%
100%
