Which best describes the main concept behind Darwin's theory of natural selection?

Organisms best suited to environment will survive/reproduce

Which outcome is MOST LIKELY at the end of an extended drought if 1 plant likes wet and 1 dry?

Ones that prefer dry soil will increase in population.

What is the MOST likely reason why some bacteria have become resistant to amoxicillin?

Few resistant ones survive, reproduce, increase population

Walruses have thicker fat layers than ancestors. The MOST likely reason for this change?

Ones with thicker layers were more apt to survive/reproduce

Which of the following is an example of evolution?

humming bird beaks that can get nectar from trumpet flowers

What inference can be made from the data in the graph?

Humans and monkeys are more similar than chickens and frogs

Which of the following is true about the fossil record?

The oldest fossils will usually be discovered deepest

Using the cladogram, which derived characteristics do rodents and rabbits have?

Vertebrae bony skeleton, four limbs an amniotic egg and hair

Which of the following BEST describe why Lamarckism was ridiculed?

Traits acquired by an organism can't be passed to offspring

Which information will be most useful in determining whether two species are closely related?

the DNA found in their bones varies by only a few genes

What do scientists learn about fossils by using carbon-14?

how long ago the fossilized organism lived

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Review Evolution

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Questions 17

Answers

1
A crocodile and a mouse have similar bone structures and develop in a similar way. ___________ Structures
analogous structures
homologous structures
vestigial structures
fossilized structures
2
Which best describes the main concept behind Darwin's theory of natural selection?
Organisms best suited to environment will survive/reproduce
organisms compete for limited resources
Organisms vary in physical traits, and some are inheritable
organisms produce more offspring than can survive
3
Which outcome is MOST LIKELY at the end of an extended drought if 1 plant likes wet and 1 dry?
Both will adapt, so the size of both will stay the same.
Ones that prefer wet soil will increase in population.
Ones that prefer dry soil will increase in population.
Both compete for space, so size of both will stay the same
4
Marsh plants grow in sea water b/c they separate salt from water for photosynthesis. Example of
speciation
adaptation
variation
mutation
5
What is the MOST likely reason why some bacteria have become resistant to amoxicillin?
Manufacturers of the drug have made it less potent
They are able to either avoid it or metabolize it
Few resistant ones survive, reproduce, increase population
They learned to survive in its presence
6
Walruses have thicker fat layers than ancestors. The MOST likely reason for this change?
Walruses inherited a thicker fat layer from their parents
With each generation, more walruses have thicker layers
they learned to develop thicker fat layers.
Ones with thicker layers were more apt to survive/reproduce
7
Which of the following is an example of evolution?
a lake drying up and all of the organisms within dying
humming bird beaks that can get nectar from trumpet flowers
a canyon deeping from river flow creating new habitats
erosion of soil limiting plant growth
8
What inference can be made from the data in the graph?
Amino acids are the building blocks in all except humans
Hemoglobin is more important to frogs than to others
Rhesus monkey and mice don't have a common ancestor
Humans and monkeys are more similar than chickens and frogs
9
Which of the following is true about the fossil record?
The oldest fossils will usually be discovered deepest
All species found on Earth are identical to their ancestors
earth's climate and geography have been constant
Youngest fossils will usually be discovered deepest
10
Worm Pesticide- Which trait of the armyworm population will improve its chances for survival?
increased reproduction
genetic variation
mobility
asexual reproduction
11
Which of the following disciplines gave the MOST support to the mechanisms of evolution?
heredity and genetics
paleontology and physiology
biology and chemistry
philosophy and logic
12
Sharks and penguins both use fins to swim, but their fins developed differently. ___________ structures
homologous structures
vestigial structures
analogous structures
fossilized structures
13
Using the cladogram, which derived characteristics do rodents and rabbits have?
An amniotic egg and hair
Vertebrae bony skeleton, four limbs an amniotic egg and hair
eggs with shells and hair
vertebrae and bony skeleton
14
Which of the following BEST describe why Lamarckism was ridiculed?
it was not well documented
It was not as good a theory as Darwin's
No evidence that giraffe necks have gotten longer over time
Traits acquired by an organism can't be passed to offspring
15
Which information will be most useful in determining whether two species are closely related?
the age of their bones, determined by carbon dating, is same
the DNA found in their bones varies by only a few genes
bones found in the same rock layer
leg bones look similiar
16
What do scientists learn about fossils by using carbon-14?
the sequence of the DNA in the fossil's genetic material
what other organisms the fossil organism is related to
how long ago the fossilized organism lived
to what taxonomic group the fossil belongs
17
Using the cladogram shown above, which two species share the closest common ancestor?
humans and prosimians
insects and birds
fish and amphibians
prosimians and birds

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