The main function of bacterial capsules is:
A. Survival against environmental dangers
B. induction of antibiotic resistance
C. Protection of bacteria against phagocytosis
D. Recognition of specific receptors on target cells
E. Reproduction
Ans: C. Protection of bacteria against phagocytosis
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In mammals, embryonic cells form an inner cell mass that will become the body of the embryo and a layer of surrounding cells that will become the chorionic membrane and placenta. What are these surrounding cells called?
A. blastocoel B. yolk C. blastodisc D. trophoblast
Preliminary digestion of carbohydrates begins in the _____
a. mouth b. esophagus c. stomach d. duodenum e. jejunum
Which muscle straightens the forearm?
a. biceps brachii b. pectoralis major c. triceps brachii d. deltoid e. trapezius
Your senior thesis project involves working out the taxonomy of Florida skinks. To accomplish this you examine skink specimens for morphological differences compare nucleotide and amino acid sequences and observe the skinks reproductive behavior and habitat types. Once you have completed the taxonomy and written the thesis you give it to your professor for comments. She tells you that you did a great job and should try to get your work published. However she suggests you indicate in the introduction what species concepts you used to make your classifications. What statement would you add?
A. Taxonomic determinations were made based on the general lineage species concepts. B. Taxonomic determinations were made based on the ecological species concepts. C. Taxonomic determinations were made based on the evolutionary lineage species concepts. D. Taxonomic determinations were made based on the biological species concepts.