Only eukaryotic cells contain membrane bound organelles (such as a nucleus). Prokaryotic cells do not. Therefore, the answer is A.
I think Subarctic, Ice cap and Tundra.
Hope it helps :)
Enable the membrane because that what the guy on the top said
Answer:
<h2>They are classified on the basis of their cell wall composition and as well as by the reaction to the Gram stain test.
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Explanation:
Most bacteria are classified into two main categories
i) Gram positive bacteria and ,
ii) Gram negative bacteria.
They are classified on the basis of their cell wall composition and as well as by the reaction to the Gram stain test.
Gram positive bacteria's characteristics
ii) they have cell walls composed mostly of peptidoglycan.
i) stain purple after Gram staining.
Gram negative bacteria's characteristics.
i) they have cell wall only a thin layer of peptidoglycan and an outer membrane with a lipopolysaccharide component.
ii) stain red or pink after Gram staining.
Answer:
A. They require a medium to travel through
Explanation:
The medium can be any substance-solid,liquid,or gas- and the wave's speed depends on the properties of the material of the medium the wave travels through.
