Which is a scientific question? can cats learn to sit down on command? why do black cats bring bad luck? are spotted cats cuter than solid-colored cats? why are persian cats so funny?

Why do oceanic plates tend to subduction when colliding with a continental plate

The function of the excretory system is to control homeostasis and

What is the function of the root cap? a. extra-absorbent cells in the root cap absorb more water and nutrients b. protect the meristematic area of the stem c. contains sensors for sunlight d. increases surface area of the root