![Biology](/tpl/images/cats/biologiya.png)
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.
![answer](/tpl/images/cats/otvet.png)
Answers: 3
Other questions on the subject: Biology
![image](/tpl/images/cats/biologiya.png)
![image](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 08:30, narwhalebearp5871i
Which member of the following food chain will be least affected by ddt, a pesticide water pollutant, if bio-magnification is occurring? algae> zooplankton> crayfish> leopard frog> large mouth bass
Answers: 3
![image](/tpl/images/cats/biologiya.png)
![image](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 12:00, ashiteru123
Refer to the family pedigree shown here. in generation i, one parent is affected by the gene mutation and one parent isn't. in generation ii, all three children are affected by the gene mutation. what can you conclude about this gene mutation? a. all children born in future generations will be affected by this disorder. b. this gene mutation is a dominant disorder. c. this gene mutation is a recessive disorder. d. the generation i mother is a carrier of this gene mutation.
Answers: 2
Do you know the correct answer?
Circadian rhythms are genetically controlled phenomena where organisms are able to control behaviors...
Questions in other subjects:
![Konu](/tpl/images/cats/mat.png)
Mathematics, 29.07.2020 21:01
![Konu](/tpl/images/cats/mat.png)
Mathematics, 29.07.2020 21:01
![Konu](/tpl/images/cats/mat.png)
Mathematics, 29.07.2020 21:01
![Konu](/tpl/images/cats/mat.png)
Mathematics, 29.07.2020 21:01
![Konu](/tpl/images/cats/es.png)
Spanish, 29.07.2020 21:01
![Konu](/tpl/images/cats/mat.png)
![Konu](/tpl/images/cats/ekonomika.png)
![Konu](/tpl/images/cats/biologiya.png)
![Konu](/tpl/images/cats/ekonomika.png)
![Konu](/tpl/images/cats/mat.png)
Mathematics, 29.07.2020 21:01