Question 4
Which of the following is found in eukaryotic cells but not in prokaryotic cells?

a nucleus
b mitochondria
c endoplasmic reticulum
d lysosomes
e all of the choices are correct

Option A) nucleus

Explanation:

Prokaryotic cells lack nuclear envelope, thus the nucleus is absent in Prokaryotic cells.

On the other hand, eukaryotic cells possess membrane bound nucleus and nuclear envelope.

Thus, nucleus is the answer

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.