The giant interconnected global ecosystem is called the

A. global community.
B. biosphere.
C. ecosphere.
D. trophic web.


B. biosphere.

Biology & Microbiology

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During the 1980s, wolves were reintroduced to Yellowstone National Park after decades of absence due to attempted extermination in the early part of the twentieth century

Within 20 years, not only had the wolf population increased, but there was also a dramatic increase in other species, such as aspen, cottonwood, and willow trees, beavers, warblers, insects, and fish. These changes in Yellowstone Park are examples of how important a(n) ________ can be to an ecosystem. A) keystone species B) competitor C) herbivore D) parasite

Biology & Microbiology

What type of monomer does ATP represent?

A. amino acid B. monosaccharide C. nucleotide D. fatty acid E. glycerol

Biology & Microbiology

A child has a history of recurring serious bacterial infections. A blood sample shows lymphocyte levels are a little below normal, and no antibodies to the pathogens are detected in serologic tests. Based on this information, which of the following is

the likeliest diagnosis for this child? A) Bruton-type agammaglobulinemia B) Grave's disease C) severe combined immune deficiency (SCID) D) systemic lupus erythematosus (SLE) E) hemolytic disease of the newborn

Biology & Microbiology

The pleomorphic bacterium ________ is an obligate parasite due to its requirement for NAD+ and heme

A) Neisseria meningitidis B) Streptococcus pneumoniae C) Listeria monocytogenes D) Haemophilus influenzae E) Streptococcus agalactiae

Biology & Microbiology