Why are there no gram-positive archaea species, but there are gram-positive bacteria species?
a.
archaea lack peptidoglycan.
b.
archaea do not have a cell membrane.
c.
archaea lack chitin.
d.
archaea do not have a cell wall.

ANSWER:

The correct option is: A. "Archaea lack peptidoglycan" in the walls of the cell. Peptidoglycan is a polymer of sugar and amino acids which forms a layer around the "plasma membrane" of bacteria.

EXPLANATION:

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".