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WorksheetsCH 18-19 Quizzizz
Total questions: 18
Worksheet time: 9mins
In biology, a trait that arose in an ancestor and is passed along to its descendants is referred to as a
derived character
taxonomic group
molecular clock
physical similarity
Which of the following is a correct explanation of a derived character?
The presence of a backbone is a derived character of mammals because all mammals have a backbone.
The presence of four limbs is a derived character of snakes because the ancestors of modern snakes had limbs, even though modern snakes do not.
The presence of hair is a derived character of mammals because all mammals have hair and no animals other than mammals have it.
Retractable claws are a derived character of carnivores because some of the animals that are carnivores have retractable claws.
Each node on a cladogram represents
the last point at which two groups shared a common ancestor.
the point at which one or more species became extinct.
the most recent point at which a trait was lost in a certain clade.
the point at which two clades joined and became monophyletic.
Similar DNA sequences in genes can be evidence of
binomial nomenclature
mutations
common ancestry
different anatomy
What do all organisms have in common?
They all use DNA to pass on information.
They are all prokaryotes.
They are all eukaryotes.
They are all genetically identical.
What is true about dissimilar organisms such as a cow and a yeast?
They are not related at all.
Their degree of relatedness cannot be evaluated.
Their degree of relatedness can be estimated from their genes.
They can interbreed and thus are the same species.
The fossil record shows
that most organisms that ever lived on Earth are now extinct.
that only bones and teeth can become fossilized.
that fossils formed under many different conditions.
a complete record of every organism that ever existed on Earth.
Fossils usually provide paleontologists with information about each of the following EXCEPT an organism’s
structure
environment
way of life.
DNA
The length of time required for half of the radioactive atoms in a sample to decay is its
half-life
relative date
radioactive date
period
To compare the relative ages of rocks, scientists sometimes use an easily recognized and widespread fossil type called
a carbon fossil.
a radioactive fossil.
an index fossil.
a sedimentary fossil.
Which of the following statements must be true for a clade to survive?
The rate of speciation must be equal to or less than the rate of extinction.
The rate of speciation must be less than the rate of extinction.
The rate of speciation must be greater than or equal to the rate of extinction.
The rate of speciation must not change over the clade’s history.
Gradualism is a pattern of evolution in which
a single species evolves into several closely related species.
several distantly related species develop similarities.
a species evolves at a slow, steady pace.
a species has periods of little evolution interrupted by periods of rapid evolution.
A single species that has evolved into several different forms that live in different ways has undergone
adaptive radiation.
coevolution
punctuated equilibrium.
mass extinction.
Mass extinction would most likely result from which of the following events?
a disease kills off a single species of predator within an ecosystem
a wildfire burns a national park
global temperatures drop several degrees after several massive volcanic eruptions
a small earthquake strikes California
The process by which two species evolve in response to changes in each other over time is called
convergent evolution.
adaptive radiation.
coevolution.
punctuated equilibrium.
A plant evolves a high level of poison that enables it to defend itself against insects. Soon an insect that prefers to eat this plant evolves an enzyme that breaks down the poison. This is an example of
convergent evolution
punctuated equilibrium
coevolution
adaptive radiation
The endosymbiotic theory proposes that eukaryotic cells arose from
communities formed by eukaryotes.
communities formed by prokaryotes.
multicellular prokaryotes.
individual prokaryotic cells.
Sexual reproduction contributes to genetic diversity by allowing
genes from a single parent to be mixed and remixed before being passed to offspring.
genes from two parents to be mixed and remixed before being passed to offspring.
unmixed genes from two parents to be passed to offspring.
a single parent to pass along a complete set of unmixed genes to offspring.
