(Q).
If moss causes chemical changes in the minerals of a rock, then what causes chemical changes in the minerals of a rock? Answer choices: - moss - hitting it with a hammer - steady temperature - bad music - copper - iron - sodium - coal
(A).
moss

(Q).
If chordates are vertebrates, then what group of animals do chordates belong to? Answer choices: - graptolites - more abundant - warm-blooded - four limbs - epidermal - Vertebrates - animals - insects
(A).
Vertebrates

(Q).
If urea is a waste product of the body that is excreted by the urinary system, then what is a waste product of the body that is excreted by the urinary system? Answer choices: - potash - food - CO 2 - sugar - urea - liquid - H 2 O - sulfur
(A).
urea