Natural Selection-Chapter 1 Review Question Preview (ID: 61601)
Chapter 1 Content For Natural Selection Chapter.
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Humans changed wolves into all breeds of dogs we have today by the process of artificial selection.
a) false
b) true
c)
d)
What is the difference between artificial selection and natural selection?
a) artificial selection is where the traits changed are brand new and natural selection is where existing traits are formed
b) in artificial selection humans determine which individuals reproduce and in natural selection the environment determines it
c)
d)
About how old do scientists think the Earth is?
a) 4.6 billion years old
b) 4.6 million years old
c) 4.6 thousand year old
d)
Dinosaurs existed in the Mesozoic Era. What did this period of geologic time end with?
a) a mass extinction likely caused by an asteroid where over 80% of all life went extinct
b) a period of time where Earth's climate got really cold and froze just the dinosaurs
c) a mass extinction likely caused by a volcano where 90% of life went extinct
d)
Is there fossil evidence that humans and dinosaurs existed at the same time?
a) no
b) yes
c)
d)
Mutations, which are changes to DNA lead to __________ of traits in a population.
a) variations
b) parents
c) selection
d)
Which is the current period of geologic time?
a) Cenozoic
b) Paleozoic
c) Precambrian
d) Mesozoic
10) ____________ is the number of traits represented on a histogram.
a) variation
b) distribution
c) population
d) gene
8) Parents choose the genes they pass down to their offspring.
a) true
b) false
c)
d)
9) Individuals in a population with _________ variations become less common.
a) gene
b) helpful
c) no
d) non-helpful
Whether or not a variation is helpful depends on the __________.
a) traits
b) parents
c) environment
d) genes
Individuals with ____________ variations are more likely to live longer and have offspring.
a) helpful
b) no
c) neutral
d) non-helpful
Changes to genes that can lead to changes to protein molecules, which can result in changes to traits are called ____________.
a) mutations
b) proteins
c) distributions
d) genes
The ____________ of individuals with each trait in a population can change over time.
a) number
b) population
c) proteins
d) genes
______________ are instructions for making protein molecules and proteins molecules determine an organism's traits.
a) parents
b) genes
c) proteins
d) siblings
Over many generations, individuals with ____________ become more common in a population
a) no
b) genetic
c) helpful variations
d) non-helpful variations
Individual organisms inherit their genes from ________.
a) parents
b) siblings
c) sleeping
d) magic
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