Which of the following is the main evidence of life in early universe? a) dinosaur fossils b) rock impressions c) remains in amber d) photosynthetic bacteria

Photosynthetic bacteria are the main evidence of life in early universe. These bacteria most likely produced oxygen, which was a waste product that was caused by photosynthesis. As the oxygen levels increased, many early forms of life were poisoned. This caused the evolution of new organisms that were able to utilize oxygen for breathing or respiration.

q: compare the parts of a cell and the cell as a whole to another common nonliving system (i.e., a car, a city,

a:

comparing this to the inside of a food building/company.

all cells are surrounded by a plasma membrane, which protects the cell from its environment, keeping toxic substances out of the cell. it regulates which molecules are allowed to enter and exit the cell.

regulates all cell activity such as cellular metabolism, and growth in addition to storing and maintaining the cell's dna for transcription and replication. determines what proteins to make.

contains the organelles; site of most cell activity

the place where ribosomes do their working activity.

builds the proteins.

prepares proteins for use or export.

responsible for breaking down and absorbing materials taken in by the cell.

maintains cell shape.

transforms one form of energy into another.

oxygen +1 most likely