Biology, 20.08.2020 03:01 lisatreshnell

In 1988, a biologist named Richard Lenski introduced 12 genetically identical populations of E. coli to test tubes and subjected them to the same conditions: a period of growth followed by starvation. After several years, all 12 strains had adapted to the conditions in similar ways; however, their genetic sequences were very different. Which of the following conclusions from this experiment is correct? a. The 12 E. coli populations underwent convergent evolution resulting from similar environmental conditions.
b. Similar selective pressures on genetically identical organisms can have different effects at the level of the genome.
c. Evolution by natural selection can be directly observed in organisms with short generation times.
d. Similar phenotypes may result from a variety of underlying genotypes.

Answers: 2

Show answers

Another question on Biology

Biology, 21.06.2019 18:30

Which table best shows the impacts resulting from human activity? impact of human activities human activity impact forest area cleared to construct an airport increase in oxygen level vegetation cleared to construct an oil mine increase in pollution impact of human activities human activity impact forest area cleared to construct an airport increase in sound pollution vegetation cleared to construct a power plant contamination of water impact of human activities human activity impact beehives cleared from urban areas increase in vegetation dams constructed on a river increase in fish population impact of human activities human activity impact beehives cleared from urban areas increase in bird population dams constructed on a river better quality of water

Answers: 3

Answer

Biology, 21.06.2019 23:10

This is the amino acid cysteine. circle the amine group, put a box aroundthe carboxylic acid group and use a different colored pencil/pen to circle the sidechain (r group). h o | ||nh2— c- c-oh | ch2 | sh

Answers: 1

Answer

Biology, 22.06.2019 00:00

As a small change in a person's dna can cause a genetic disorder

Answers: 3

Answer

Biology, 22.06.2019 02:30

Did you know that a single bee would have to go to over 2 million flowers to make a single pound of honey?

Answers: 1

Answer

You know the right answer?

In 1988, a biologist named Richard Lenski introduced 12 genetically identical populations of E. coli...