Answer:
a closed circulatory system.
Explanation:
an earthworm circulates blood exclusively through vessels.
The connection between the political situations in Iran and Nicaragua during the mid-1980s was both countries fought the USSR with weapons supplied by the United States. The correct answer is D.
Answer:
D. archaeal membranes contain L-glycerol.
Explanation:
Archaea and eubacteria differ from each other with respect to the nature of membrane lipids. Lipids present in the membranes of the archaeans have the hydrocarbons derived from isoprene units. These hydrocarbons are branched and are attached to the glycerol with help of ether linkage. Ester linkages are present in eubacteria. The glycerol present in the archaeans is L- glycerol. Bacterial membranes have D-glycerol present in their lipids.