The animal in the above photograph was
adversely affected by ____ and is making a
comeback thanks to ____.
a. global cooling; heat producing chemical
added to their diet
b. sexually transmitted viruses; a new vaccine
c. limited number of natural cavities; artificial
nesting boxes
d. high incidence of males being born;
transplantation of females from other areas
e. all of these
C
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The individualistic model of a community as an assemblage coexisting primarily of species similar in their physiological requirements was proposed by
A. Frederic Clements. B. Charles Darwin. C. Henry Allan Gleason. D. David Tilman. E. Joseph Connell.
Propose an appropriate solvent to be used in the extraction of photosynthetic pigments from chloroplasts. Explain your
choice. What will be an ideal response?
All of the following bacteria are part of the normal flora EXCEPT:
A. Salmonella spp. B. Bacteroids spp. C. Lactobacillus spp. D. Staphylococcus spp. E. Viridans streptococci
Some breeds of dogs that are specialized to retrieve objects from bodies of water have webbing between their toes. A change in what cellular response to positional information during digit formation could account for this morphological feature?
A. cells between the future digits do not divide before migrating to the region that will become toes B. cells between the future digits migrate, but do not divide once they are in the region that will become toes C. cells between the future digits divide, but do not migrate to the region that will become toes D. signals that cause differentiation to toes are not received by cells that become webbing E. signals to cause apoptosis are not received by cells that become webbing