Question:All known organisms use genetic information to produce protein molecules via the same genetic code. This finding strongly supports the hypothesis that __________.
a) the earliest macromolecules probably arose when lightning struck an oxygen-free atmosphere
b) all organisms are descended from one or a few common ancestors
c) the genetic code readily evolves by natural selection
d) there's only one possible way to encode information in a macromolecule
Answer:
b) all organisms are descended from one or a few common ancestors
Explanation:
Protein synthesis occurs when the nucleotide sequence of the mRNA is read in the form of genetic codes. A specific genetic code specifies the same amino acid in all living beings. For example, the code "UUU" codes for phenylalanine in all the living beings irrespective of their species. This suggests that all the life forms have originated from one or few common ancestors and the genetic code has been preserved during the course of evolution of various species.
It will reduce genetic diversity, I believe so
Sister chromatids separate during anaphase
C) The increase in greenhouse gas emissions is like placing an extra log on the fire to produce more heat.
Explanation:
The increase in greenhouse gas emission cannot be likened to placing an extra log on the fire to produce more heat.
In essence, the earth is not receiving more heat than usual from the sun. It is not getting more heated.
- Greenhouse gases prevents heat from being lost from the earth surface as long wave radiation.
- This in turn will warm and heat the earth surface.
- The more the greenhouse gases, the more heat that is trapped within the earth.
- The greenhouse gases is the cover that prevents heat from being lost.
- Global warming is what results.
- An increase in heating might not cause warming of the house if the house is open.
- So also, if the earth receives more energy from the sun, the temperature might not increase if no greenhouse cover is available.
Other analogies shows heating(global warming) and cover(greenhouse gases) except of C.
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Greenhouse gases brainly.com/question/4580761
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<span>An
atom with an atomic number of 12 has 12 protons. Because the mass
number is the sum of the protons and neutrons, the mass number would
need to be at least 12. I hope this helped!
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