Biology, 13.12.2019 07:31 cmflores3245
Circadian rhythms are genetically controlled phenomena where organisms are able to control behaviors, even in the absence of environmental cues, for a period of time approximating 24 hours. paramecia feed and mate based on circadian rhythms. plants open and close their stomata based on these genetic controls. animals demonstrate periods of waking and sleeping that follow 24 hour trends, even without light cues. what is the likely explanation for the evolution of circadian rhythms?
a) circadian rhythms evolved in a common ancestor to life, but was lost in prokaryotes.
b) circadian rhythms evolved in a common ancestor to life and is present in all life forms.
c) circadian rhythms evolved at least three separate times, in protists, plants, and animals.
d) circadian rhythms evolved on the branch containing eukaryotes and are found in all eukaryotes.
Answers: 3
Biology, 21.06.2019 13:30
Which of the following is not a classification of marine organisms? a. benthos c. neritic b. nekton d. plankton select the best answer from the choices provided a b c d
Answers: 1
Biology, 21.06.2019 18:30
What role do traits play in affecting an organisms ability to reproduce? finches
Answers: 1
Biology, 22.06.2019 06:10
The normal shape of an enzyme is as shown in structure a. if the enzyme’s shape changes to that shown in structure b, what are two consequences of this change?
Answers: 1
Biology, 22.06.2019 13:00
Describe the impact of deforestation of both abiotic and biotic factors within the tropical rainforest.
Answers: 2
Circadian rhythms are genetically controlled phenomena where organisms are able to control behaviors...
Chemistry, 03.04.2020 00:52
Mathematics, 03.04.2020 00:52
Advanced Placement (AP), 03.04.2020 00:53
Mathematics, 03.04.2020 00:53
Mathematics, 03.04.2020 00:53
Mathematics, 03.04.2020 00:53
History, 03.04.2020 00:53