Answer:
(B) resemble structures formed by bacterial communities that are found today in some shallow marine bays.
Explanation:
Extant stromatolites represent real "living fossils" for they are decendents of ancient forms that are associated with one of the first living forms on earth. Particularly, stromatolites are real bacteria communities where the autotrophic organism of the community are represented by cyanobacteria, which live along with heterotrophic bacteria. This clearly indicates that fossilized stromatolites points to bacteria (prokaryotes) as the first living things on earth (dated with not less than 3.5 billion year old)
Nowadays, stromatolites with cyanobacteria allows to reconstruct and understand fossilized forms. These current structures live in shallow marines ambients (e.g. Australia) but also in continental salt flats (e.g. Argentina) where few others bacteria can survive to these extreme conditions (high light exposure and salt concentration).
Answer:
coenzyme A
Explanation:
Coenzyme A is essential. The body produces it and cannot function without it. It facilitates at least 100 chemical reactions in the body. Coenzyme A is considered to be an auxiliary molecule, a chemical that is necessary for the activation of certain enzymes and proteins or important chemical reactions.
Coenzyme A is a molecule - a helper that facilitates the oxidation process. This process leads to the formation of acetyl Coenzyme A - an important substance used for the production of manic acids in a living cell. Without this very important process, there would be no production of fatty acids that maintain the cell membrane.
No, because there is no oxygen.
Answer:
Each ribosomal subunit has three binding sites for tRNA: designated the A (aminoacyl) site, which accepts the incoming aminoacylated tRNA; P (peptidyl) site, which holds the tRNA with the nascent peptide chain; and E (exit) site, which holds the
Explanation:
Each ribosomal subunit has three binding sites for tRNA: designated the A (aminoacyl) site, which accepts the incoming aminoacylated tRNA; P (peptidyl) site, which holds the tRNA with the nascent peptide chain; and E (exit) site, which holds the
D. chlorophyll is the main source of light in photosynthesis
