Question

question 17 (1 point)
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 50 years

question 18 (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:

Question 17

A scientific theory explains phenomena, while a law describes them. Theories don't become laws—they are distinct. So "never, under any circumstances" is correct. Options a, b, d are wrong as testing, voting, or time don't turn theory to law.

Eukaryotic cells have a nucleus and membrane - bound organelles (like mitochondria, ER). Prokaryotes lack a nucleus and membrane - bound organelles. Option a matches this. Option b: prokaryotes have non - membrane organelles (e.g., ribosomes) but no nucleus. Option c: both have cell membranes and non - membrane organelles. Option d: Prokaryotes have DNA in cytoplasm, eukaryotes have it in nucleus.

Answer:

c. never, under any circumstances

Question 18