Answer:
Node
Clade
Taxa
Explanation:
Node is a point in a cladogram where a single ancestral lineage breaks into two or more descendant lineages. A node usually has similar characteristics due to the common ancestral lineage.
Clade is a group of organisms that includes an ancestor and all of its descendants. An example is birds, dinosaurs and crocodiles all belonging to a common ancestor as animals but different descendants.
A taxa is any named group of organiſms,
whether they form a clade or not. It represent any level of taxonomic groupings.
D.it is surrounded by a cell membrane
Sex linkage is the phenotypic expression of an allele that is dependent on the gender of the individual and is directly tied to the sex chromosomes. ... In mammals the homogametic sex is female (XX) and the heterogametic sex is male (XY), thus the sex linked genes are carried on the X chromosome.
I would go with B, because that is what basically would move fluid in our body. Nothing else, because our heart is like a pumper, that always pumps blood through your whole body. Unless until you die, and then it stops.
Hope that this would help you!
