A cloud of gas, if large enough, begins to contract. The density and temperature increase, so that nuclear fusion can begin. This is when Hydrogen becomes Helium.When hydrogen is "burned", the contraction stops. At this time, the gas becomes a star
Answer:
Part A. CGA-UUA-CAG
Part B: Ala-Asn-Val
Step-by-step explanation:
Part A
The complementary base pairs are A-U and G-C.
Each type of RNA has a complementary base.
mRNA: GCU-AAU-GUC
tRNA: CGA-UUA-CAG
The tRNA coding sequence is CGA-UUA-CAG.
Part B
We can use your amino acid coding wheel to determine the amino acids the mRNA codes for.
Follow the red arrows from the centre to the amino acid at the circumference.
The top arrow:
GCU ⟶ Ala
The bottom arrow:
AAU ⟶ Asn
The middle arrow:
GUC ⟶ Val
Thus, the amino acid sequence is
Ala-Asn-Val or alanine-asparagine-valine
The RNA sequence codes for alanine, asparagine, and valine.
Answer:old earth:
At its beginning, Earth was unrecognizable from its modern form. At first, it was extremely hot, to the point that the planet likely consisted almost entirely of molten magma. Over the course of a few hundred million years, the planet began to cool and oceans of liquid water formed.The early Earth's atmosphere had a very low concentration of oxygen compared to today. 2.4 billion years ago, the oxygen concentration in the atmosphere was less than one part per billion and the iron concentration in the ocean was much higher than today.At its beginning, Earth was unrecognizable from its modern form. new earth:
"Today's Earth (TE)" is JAXA's land surface & river simulation system developed under the joint research with University of Tokyo. The system distributes & visualizes various hydrological products and their magnitudes for disaster monitoring and hydrological research.
The early Earth was very different from our Earth today. The early Earth experienced frequent impacts from asteroids and meteorites and had much more frequent volcanic eruptions. There was no life on Earth for the first billion years because the atmosphere was not suitable for life.
Explanation:
Cellular respiration is the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining activities. Examples of these life sustaining activities include converting carbon dioxide into oxygen, digesting food and just existing in the first place.
It's similar to respiration in humans, where it allows the processes that keep us alive to continue.
Let me know if further explanation is needed.
Prokaryotes are single-celled organisms of the domains Bacteria and Archaea. All prokaryotes have plasma membranes, cytoplasm, ribosomes, a cell wall, DNA, and lack membrane-bound organelles. Many also have polysaccharide capsules. Prokaryotic cells range in diameter from 0.1–5.0 µm.
Like a prokaryotic cell, a eukaryotic cell has a plasma membrane, cytoplasm, and ribosomes, but a eukaryotic cell is typically larger than a prokaryotic cell, has a true nucleus (meaning its DNA is surrounded by a membrane), and has other membrane-bound organelles that allow for compartmentalization of functions. Eukaryotic cells tend to be 10 to 100 times the size of prokaryotic cells.