Evolution and Biodiversity
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Evidence for evolution
SubtopicEvidence for evolution under Evolution and Biodiversity for Grade 12 IB.
Preview questions (no answers)
- 1.
The evolution of the modern horse from a small, multi-toed ancestor is supported by:
A.DNA alone
B.A series of transitional fossils
C.Observing horses in the wild today
D.Selective breeding by early humans
- 2.
Which of the following is true about the fossil record?
A.It is complete and shows every organism that ever lived
B.It shows that life has been the same since the Earth formed
C.It provides evidence that species have changed over time
D.It only contains fossils of animals, not plants
- 3.
The presence of gills in the early embryonic stages of mammals, birds, and reptiles is evidence for:
A.Convergent evolution
B.Common ancestry
C.The fact that they all still live in water
D.Artificial selection
Download the worksheet for Evolution and Biodiversity - Evidence for evolution to practice offline. It includes additional chapter-level practice questions.
Natural selection
SubtopicNatural selection under Evolution and Biodiversity for Grade 12 IB.
Preview questions (no answers)
- 1.
What is the role of meiosis in the process of evolution by natural selection?
A.It produces identical cells for growth
B.It generates variation through new allele combinations
C.It ensures that all offspring have the same phenotype
D.It decreases the number of chromosomes in every generation
- 2.
Which of the following is a result of natural selection favoring camouflage in an animal species?
A.Increased detection by predators
B.Increased survival and reproduction of hidden individuals
C.A decrease in the variation of skin colors
D.The ability of the animal to change color like a chameleon
- 3.
Which observation about populations was a key part of Darwin's theory?
A.Populations usually produce more offspring than the environment can support
B.All offspring in a population are genetically identical
C.Resources in the environment are always infinite
D.Individuals do not vary in their physical characteristics
Download the worksheet for Evolution and Biodiversity - Natural selection to practice offline. It includes additional chapter-level practice questions.
Classification of biodiversity
SubtopicClassification of biodiversity under Evolution and Biodiversity for Grade 12 IB.
Preview questions (no answers)
- 1.
What is the correct way to write the species name for humans if it is handwritten?
A.Homo sapiens
B.Homo Sapiens
C.Homo sapiens
D.homo sapiens
- 2.
Which of the following is a characteristic of all members of the domain Eukarya?
A.They are all multicellular
B.They all have cell walls made of cellulose
C.Their cells contain a nucleus
D.They all perform photosynthesis
- 3.
What is the taxonomic rank that is more specific than Class but less specific than Family?
A.Kingdom
B.Phylum
C.Order
D.Genus
Download the worksheet for Evolution and Biodiversity - Classification of biodiversity to practice offline. It includes additional chapter-level practice questions.
Cladistics
SubtopicCladistics under Evolution and Biodiversity for Grade 12 IB.
Preview questions (no answers)
- 1.
What does a cladogram primarily represent?
A.A timeline of all life on Earth
B.A hypothesis about evolutionary relationships
C.The physical growth of an individual
D.The population density of a species
- 2.
In the context of the figwort family reclassification, what did scientists find regarding the species previously in the group?
A.They all had identical DNA
B.They did not all share a common ancestor, making the group invalid
C.They were all found to be extinct
D.They all moved to a new geographic location
- 3.
What is the most likely reason for two unrelated species to have similar traits?
A.They occupy similar niches and face similar selection pressures
B.They have identical DNA sequences
C.They interbred in the past
D.They both evolved from the same recent common ancestor
Download the worksheet for Evolution and Biodiversity - Cladistics to practice offline. It includes additional chapter-level practice questions.