Answer:
1) The origin of life. 2) The mechanisms of evolution. 3) The control of the size, both of the organs and of the living beings.
Explanation:
Some examples,
Are gender traits completely a result of societal expectations?
Are there any parts of the human body that get oxygen directly from the air and not from the blood?
Are there nuclear reactions going on in our bodies?
Can humans ever directly see a photon?
Answer:
Low phenylalanine concentration:
- If the enzyme is inactive, PAH will look like its inactive form, with phenylalanine located in the allosteric site / inactive site so that PAH is a different shape. This will not allow as much phenylalanine to be converted into tyrosine, as we wait for Phe levels to increase.
High phenylalanine concentration:
- If the enzyme is active, PAH will look like its regular form, with an open active site that's the size of phenylalanine so that reactions can occur. (Like a hand fitting into a glove, or a lock into a key.) Phenylalanine will be the substrate, the thing acted upon by the enzyme. This will eventually raise the amount of tyrosine that's created and lower the concentration of phenylalanine.
Think about it like this. Ever heard of homeostasis? That's how the body likes to be the same, keep everything regulated, all the time. So if there are high levels of something, the body is going to try to keep that something down, and if there are low levels, it's going to try to increase the concentration of that thing.
IT IS THE PERCENTAGE OF INHERITED TRAITS
Bacteria: Bacteria: Cell walls with peptidoglycan, includes autotrophs and heterotrophs, Prokaryotic cells
Archaea: Includes methanogens and halophiles, Prokaryotic cells, includes autotrophs and heterotrophs.
Eukarya: Includes plants, animals and fungi, eukaryotic cells, includes autotrophs and hetrotrophs.
Explanation:
Bacteria are the unicellular prokaryotes with a distinct feature of cell wall made up of peptidoglycan.
Archaea: They are unicellular and lack a defined nuclei and lives in extreme climate.
Eukarya: multicellular, Eukaryotic, well-defined nucleus, membrane-bound organelle, no cell wall.
