Biology, 17.01.2020 17:31 enevjordan
The pictures below show the bone structures of three different animals.
the similarity in structure of the bones of these animals suggest:
group of answer choices
the size of the bones is the same
these species share a common ancestor
these species developed at the same time and location
the chemical makeup of these animals is exactly the same
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question 26.6 pts
which of the following is not true about natural selection?
group of answer choices
it results in adaptations that improve an organism's chance of survival
it ensures that only the biggest and strongest organisms survive
it depends on both inheritance and variation
it explains how environments affect which organisms live and reproduce
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question 36.7 pts
a structure that seems to serve no purpose in an organism is called:
group of answer choices
homologous
dichotomous
vestigial
fossilized
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question 46.7 pts
a population of bacteria is treated with hand sanitizer. because of genetic variation in the population, what is the possible outcome?
group of answer choices
there will be no change in the bacteria.
some of the bacteria may be resistant and survive.
the population will grow quickly
all of the bacteria will double in size
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question 56.6 pts
which of the following does not increase genetic variation?
group of answer choices
mutations
gene flow
mitosis
crossing over
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question 66.7 pts
which of the following is not an example of evolution?
group of answer choices
a caterpillar changing into a butterfly
horses becoming taller and faster over millions of years
humans brains becoming larger over time
all species of tortoises in the galapagos islands descending from a common ancestor.
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question 76.6 pts
a feature that allows an organism to better survive in its environment is a(n):
group of answer choices
variation
adaptation
dna molecule
fitness
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question 86.7 pts
genes for traits that an organism be more reproductively successful can be expected to:
group of answer choices
cause it to evolve into a new species
eventually be eliminated by natural selection
become more common in the future
cause the extinction of the species
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question 96.7 pts
scientists can explore whether two different animal species have evolved from a common ancestor, using evidence from all of the sources below except:
group of answer choices
analysis of strands of dna
studies of embryos during development
comparison of bones and muscles
comparison of experiences from each organism
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question 106.7 pts
how can geography lead to reproductive isolation?
group of answer choices
subspecies may choose to occupy different areas for competitive reasons
a physical barrier may arise and separate a population, preventing interbreeding
some populations may have a milder habitat than other populations
extremes of temperatures may reduce the breeding opportunities for some
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question 116.6 pts
which of these scenarios is an example of natural selection?
group of answer choices
people kill rattlesnakes that rattle when approached by humans, but people do not kill rattlesnakes that remain silent. the quiet snakes survive and breed
dogs that have a desirable coat color are bred with one another to produce puppies with the same coat color
giraffes that have longer necks survive a dry season by eating leaves from the tops of trees. those giraffes breed more successfully that year
farmers crossbreed two types of cows to produce a breed of cow that has high quality beef and can tolerate a hot climate
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question 126.6 pts
the combination of all the genes in a breeding population are referred to as:
group of answer choices
chromosomes
individuals
gene flow
gene pool
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question 136.7 pts
how do mutations influence evolution?
group of answer choices
a heritable characteristic that increases an organisms chance at surviving and reproducing in its given environment
the mutation causes more awareness and intelligence so that the organism can out compete others
a change in the dna produces a variation within the gene
creates a new body part or structure that allows for a better chance at survival
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question 146.7 pts
what is the best description for evolution?
group of answer choices
a change in a population over time
a change in an organism over time
the variation of species globally
the diversity between us and other living things
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question 156.7 pts
in order for a species to evolve, it must be able to:
group of answer choices
be domesticated
consume a large quantity of food
reproduce successfully
maintain a constant body temperature
Answers: 1
Biology, 21.06.2019 22:40
Environmental differences within ecosystems are generally caused by
Answers: 1
Biology, 21.06.2019 23:00
Explain why process 2 is so important to sexual reproduction identify processes 1 and 3 state one difference between the cells produced by process 1 and cells produced by process 3
Answers: 3
Biology, 22.06.2019 05:00
Asea turtle has washed up on a remote section of a beach. this known as a stranding occurs when a dead,sick or injured sea turtle washed up on the shoreline. which statment best explain why stranding should be reported immediately to local authorities
Answers: 1
The pictures below show the bone structures of three different animals.
the similarity...
the similarity...
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