Aristotle developed the first classification system and divided all known organisms into two groups:
plants and animals. He further divided the
animals into three smaller subgroups: land
dwellers, water dwellers, and air dwellers. What
question can be asked to highlight the problems
with this classification system?
A. Would all fish be classified into the same
subgroup, even though some live in lakes and
others in oceans?
B. Are penguins classified like other birds, even
though they don't fly?
C. Would two different breeds of dogs be classified
into the same subgroup?
D. How many animals can fit into each subgroup?

Which of the following is not a characteristic of carnosaurs? a. long narrow skulls b. strong forelimbs c. horn projecting from their skulls d. none of the above

Part a - prefixes, roots, and suffixes match these prefixes, suffixes and roots to their meanings. phospho- angio- -uria -tropic -phag- a. the word root means blood or lymph vessels. b. the word root means urine. c. the word root means feeding or eating. d. the word root means phosphate or phosphorus. e. the word root means attracted specifically to the specified organ or tissue. part b – match these vocabulary terms to their meanings. gonadotropic polyuria angiotensin ii polyphagia phosphodiesterase upon the release of renin, is produced and stimulates vasoconstriction and the release of aldosterone. fsh and lh are examples of hormones, which target the ovaries or testes. an enzyme that degrades second messengers like camp or cgmp is . overproduction of urine, or , is a sign of diabetes mellitus. overeating, or , is a sign associated with diabetes mellitus.

What two fields of study provide the core information that is used to classify organisms?