What is the term for organisms in which internally-fertilized eggs are laid to develop and hatch outside the mother's body?
A. placental
B. viviparous
C. oviparous
D. marsupial
E. ovoviviparous
C. oviparous
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Use the following information to answer the following question(s): You wake up one morning feeling slightly under the weather. A close family member enthusiastically suggests that you take some Echinacea, an herb commonly used as a cold remedy. You then decide to design an experiment to test Echinacea and see if this claim is true. You think, "If taken at the beginning of a cold, Echinacea will reduce cold symptoms."You decide to test the effects of Echinacea on 100 people who are experiencing similar cold symptoms. Which of the following groups would represent an appropriate control in your experiment?
A. 100 sick people given tablets similar to Echinacea but with no herb B. One healthy person given Echinacea tablets C. One sick person given Echinacea tablets D. 100 healthy people given tablets similar to Echinacea but with no herb
The simplest structure shared among all living organisms is the
A. gut. B. cell. C. photosynthetic chloroplast. D. community. E. nucleus.
While shopping at your local drugstore, you stop at the blood pressure machine. It measures your blood pressure as 115/75 (good—that's healthy!). This number means that
A. arterial pressure is 115 mm Hg when the ventricles contract and 75 mm Hg in between ventricular contractions. B. arterial pressure is 75 mm Hg when the ventricles contract and 115 mm Hg in between ventricular contractions. C. arterial pressure is 115 mm Hg when the atria contract and 75 mm Hg in between atrial contractions. D. your sinoatrial node generates a 115 mV signal and your atrioventricular node generates a 75 mV signal. E. your sinoatrial node generates a 75 mV signal and your atrioventricular node amplifies this to a 75 mV signal.
The production of cholera toxin by virulent strains of Vibrio cholera is dependent upon genes in a bacteriophage. This is an example of ________.
A. induction B. bacterial transformation C. transduction D. lysogenic conversion