Question

when, if ever, can a scientific theory become a scientific law?
○ a after rigorous testing by many scientists
○ b after a vote by professional scientists
● c never, under no circumstances
○ d after the theory has proven useful for at least 20 years

question 13 (1 point)
eukaryotic and prokaryotic cells have some parts that are different. which are found only in a eukaryotic cell?
○ a membrane bound organelles and a nucleus
○ b nucleus and organelles without a membrane
○ c cell membranes and organelles without membranes
○ d membrane - bound organelles and dna in the cytoplasm

Explanation:

First Question (Scientific Theory to Law)

Scientific theories explain why phenomena occur, while laws describe what happens. Theories can't become laws as they serve different purposes. Rigorous testing, votes, or time don't change this distinction.

Eukaryotic cells have a nucleus and membrane - bound organelles (like mitochondria, endoplasmic reticulum). Prokaryotes lack a nucleus and membrane - bound organelles. Option a matches this: membrane - bound organelles and a nucleus are unique to eukaryotes. Option b: prokaryotes have non - membrane - bound organelles (e.g., ribosomes), so wrong. Option c: both have cell membranes and non - membrane - bound organelles, wrong. Option d: Prokaryotes have DNA in cytoplasm, so wrong.

Answer:

c. never, under no circumstances

Second Question (Eukaryotic vs Prokaryotic Cells)