(Question)
Q: Living species of chordates are classified into three major subphyla: vertebrata, urochordata, and what? Choices: - spirogyra - invertebrates - xerophyte - cephalochordata A:
(Answer)
cephalochordata

(Question)
Q: What force pulls bodies with mass together? Choices: - thermal - solar - isolation - gravity A:
(Answer)
gravity

(Question)
Q: What is the process whereby excess water and waste is removed from the body? Choices: - filtration - diffusion - exhalation - excretion A:
(Answer)
excretion