Question

what is the primary evolutionary distinction that separates a eukaryotic organism from a prokaryotic organism? the presence of a cell wall for structural support the presence of a membrane - bound nucleus and other organelles the ability to perform cellular respiration to generate atp the use of dna as genetic material
a polar bears fur is designed to repel water, keeping its skin dry in freezing temperatures. which property of water is most directly responsible for the water beading up on the fur instead of soaking in? density of water cohesion specific heat adhesion
a scientist is examining a muscle cell that requires a high and constant supply of atp to function. which organelle would you expect to be found in the highest concentration within this cell? hint: where is energy produced? lysosomes nucleus rough endoplasmic reticulum mitochondria

Explanation:

1. Eukaryotic organisms have a membrane - bound nucleus and other organelles, which prokaryotes lack. Cell walls are present in some prokaryotes and plants (eukaryotes), cellular respiration can occur in prokaryotes too, and both use DNA as genetic material.
2. Cohesion is the property of water molecules to stick together. This causes water to bead up on surfaces like a polar bear's fur instead of soaking in.
3. Mitochondria are the power - houses of the cell and produce ATP through cellular respiration. Muscle cells requiring high ATP would have a high concentration of mitochondria.

Answer:

1. the presence of a membrane - bound nucleus and other organelles
2. cohesion
3. Mitochondria