Which of the following are most closely related
according to the most modern hypothesis of animal
evolutionary relationships?
a. arthropods and roundworms
b. mollusks and tardigrades
c. annelids and cnidarians
d. chordates and flatworms
e. echinoderms and mollusks
Answer: a
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Match the following items with the correct phrases.
_______1. The “building blocks” are held together by glycosidic bonds. _______2. Composed of “building blocks” that contain phosphorous. _______3. Polymers that are composed of amino acids. _______4. Enzymes are examples. _______5. Cellulose, glycogen, and starch are examples. _______6. The “building blocks” are held together by peptide bonds. a. polypeptides b. polysaccharides c. nucleic acids d. substrates
An organism maintaining homeostasis with respect to sodium ion concentration in the blood would ______sodium excretion in the kidneys when sodium levels were low and ______ sodium excretion when sodium levels were high
a. maintain constant; maintain constant b. increase; maintain constant c. increase; decrease d. decrease; maintain constant e. decrease; increase
Plasma normally amounts to what percent of the total
blood volume? a. 15 to 25 b. 33 to 40 c. 50 to 60 d. 66 to 75 e. about 80
The digestion of __________ begins in the mouth
a. carbohydrates b. proteins c. lipids d. nucleic acids e. none of these