An insect population grows exponentially until an early winter freeze kills almost all of the insects. The next spring, the population grows exponentially again. This type of population growth is called
A) boom-and-bust cycles.
B) sustained cycling.
C) density-independent growth.
D) S-curve growth.
E) density-dependent growth.
A
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True or False: Fleshy-finned fish (coelacanth and lungfish) are the fish very closely related to tetrapods
A. true B. false
Match the following items with the correct phrases.
_______1. A ____________________ is a membrane-bound vesicle containing only an ingested object. _______2. The directed migration of leukocytes is known as ____________________. _______3. A ____________________ is a membrane-bound vesicle containing an ingested object and digestive enzymes. _______4. ____________________ is an increase in the diameter of blood vessels. _______5. ____________________ is a process by which phagocytosis is facilitated by the deposition of antibodies or complement fragments onto the surface of particles or cells. A. chemotaxis B. opsonization C. phagolysosome D. phagosome E. vasodilation
A staphylococcal isolate that gives a negative result using the Cefinase disk and tests resistant to penicillin by disk diffusion means that:
a. the isolate may contain the mecA gene. b. the bacteria produce the lactamase en-zyme. c. the isolate is also resistant to ampicillin, carbenicillin, ticarcillin, and imipenem. d. the isolate is also resistant to oxacillin, cefoxitin, and ticarcillin-clavulanate.
Smells and food aromas often produce an intense emotional impact. What is the biological basis of this response?
What will be an ideal response?