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WorksheetsGenetics and Extinction
Total questions: 20
Worksheet time: 18mins
A culture of cells is exposed to radiation. Afterwards, many of the cells appear different. What has probably occurred?
mutation
speciation
bacterial infection
contamination
Why does sexual reproduction result in greater diversity among offspring than does asexual reproduction?
Only mitosis must occur in sexual reproduction
New combinations of genes result from sexual reproduction.
Sexual reproduction occurs at a faster rate.
Mutations are caused by sexual reproduction.
Different forms of a gene are referred to as
autosomes
alleles
chromatids
The chances of developing cancer, diabetes, or sickle-cell anemia are higher if a family member also has the disorder because they are
related to diet
genetically based
passed through blood contact
highly infectious
How do fossils form
an insect becomes trapped in amber
an entire organism becomes frozen in ice.
a dead organism becomes buried in sediment
All of the above
Which of the following is most likely to become preserved as a fossil?
a leaf
a worm
jelly fish
clam shell
What do Fossils show us?
Exactly what dead organisms looked like
How much or how organisms have changed over time
How organisms have stayed the same
In the Picture - Where are the oldest fossils of the organisms that lived longest ago found?
At the bottom
At the top
In the middle
This classification of risk means that the species is at serious risk of extinction.
threatened
vulnerable
endangered
extinct
Forest clearing, farming, and road building are all examples of
Biodiversity
Population distribution
Habitat loss
Climate Change
All of the following affect biodiversity only in certain locations and times, EXCEPT:
Pollution
Invasive Species
Climate Change
Overharvesting
