According to sigmund freud, there are two levels of consciousness.

Classify the structures as homologous or analogous, depending on their structure and function.

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.

This is collection of data made by comparing objects in standard units. in science, the units are metric.