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Scientists excavate the skull of an extinct wolf. Based on the evidence, researches determine the extinct wolf diverged from modern wolfs 2 million years ago. What evidence did they use to determine this?
25%
17
The whales descended from a legged ancestor.
Allows the seeds to spread easily to limit competition for limited resources.
Fossil record and DNA evidence.
All organisms share the same nucleotides in their DNA.
25%
monohybrid cross
Dandelions produce seeds that are light weight and blow easily with the wind. Why did the dandelions develop this adaptation?
25%
17
The whales descended from a legged ancestor.
Allows the seeds to spread easily to limit competition for limited resources.
Fossil record and DNA evidence.
All organisms share the same nucleotides in their DNA.
25%
monohybrid cross
What best explains the presence of leg bones in baleen whales?
25%
17
The whales descended from a legged ancestor.
Allows the seeds to spread easily to limit competition for limited resources.
Fossil record and DNA evidence.
All organisms share the same nucleotides in their DNA.
25%
monohybrid cross
A buttefly has 4 offspring. 2 offspring are striped and 2 offspring are spotted. These results indicate these patterns are the result of a
25%
17
The whales descended from a legged ancestor.
Allows the seeds to spread easily to limit competition for limited resources.
Fossil record and DNA evidence.
All organisms share the same nucleotides in their DNA.
25%
monohybrid cross
What percentage of offspring in a dihybrid cross of DdFf and ddff are expected to be heterozygous for both traits?
25%
17
The whales descended from a legged ancestor.
Allows the seeds to spread easily to limit competition for limited resources.
Fossil record and DNA evidence.
All organisms share the same nucleotides in their DNA.
25%
monohybrid cross
A species contains 34 chromosomes. How many chromosomes are in the haploid cells?
25%
17
The whales descended from a legged ancestor.
Allows the seeds to spread easily to limit competition for limited resources.
Fossil record and DNA evidence.
All organisms share the same nucleotides in their DNA.
25%
monohybrid cross
Organisms can be classified based on homology, or shared characteristics inherited from a common ancestor. Recently, molecular biologists have been able to compare homologies at the genetic level. Why is this possible?
25%
17
The whales descended from a legged ancestor.
Allows the seeds to spread easily to limit competition for limited resources.
Fossil record and DNA evidence.
All organisms share the same nucleotides in their DNA.
25%
monohybrid cross
Pink flowers result because the alleles for red and white are codominant. When two pink flowers are crossed, what percentage of offspring are red?
25%
17
The whales descended from a legged ancestor.
Allows the seeds to spread easily to limit competition for limited resources.
Fossil record and DNA evidence.
All organisms share the same nucleotides in their DNA.
25%
monohybrid cross
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