"Viruses straddle the definition of life. They lie somewhere between supra molecular complexes and very simple biological entities. Viruses contain some of the structures and exhibit some of the activities that are common to organic life, but they are missing many of the others. In general, viruses are entirely composed of a single strand of genetic information encased within a protein capsule. Viruses lack most of the internal structure and machinery which characterize 'life', including the biosynthetic machinery that is necessary for reproduction. In order for a virus to replicate it must infect a suitable host cell".
From The Bacteriophage T4 Virus
Answer:
It controls the movement of dissolved substances in and out of the cell.
Explanation:
It is said to be semi-permable
Answer:
A bacterial cell is filled with cytoplasm in which molecules of DNA float freely as they do not have a nucleus. In addition to this the only membrane bound organelle is the ribosome.
Explanation:
Answer:
The correct answer is D: They provide the water needed.
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A) Algae
Reason- PHOTic means the light area of the ocean. The root PHOT/PHOS is latin for light. Algae must have light to perform photosynthesis.
