The leopard seal's primary predator is called the:
a. sperm whale.
b. polar bear.
c. killer whale.
d. salt water crocodile.
e. Weddel seal.
C
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The water lattice illustrated in the figure above forms as a result of ____ between water molecules
a. covalent bonds b. hydrogen bonds c. nonpolar interactions d. ionic bonds e. van der Walls forces
To allow cell wall extension with new peptidoglycan during cell division, preexisting peptidoglycan is severed using ________ to cleave the ?-1, 4 glycosidic bonds
a. autolysins b. crescentins c. transglycosylases d. both autolysins and transglycosylases
In the cAMP pathway, the G protein stimulates
a. phospholipase C b. adenylyl cyclase c. the endoplasmic reticulum d. calmodulin
Feeling tired after a long day of work, you walk across a parking lot at night to get to your car. As you approach the car you see a shadow extending behind the back of the car. You immediately feel a rush of energy, your heart starts pounding, and you
feel wide awake and alert. You are experiencing A) an allergic reaction. B) a drop in blood pressure. C) the fight-or-flight response. D) effects of endocrine disruptors.