In evolution, gene flow and reproduction are successful only when___ offspring are produced.
What will be an ideal response?
fertile
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Which medium can be described as suppressing the growth of most gram-negative organisms while allowing gram-positive bacteria to grow?
a. Chocolate b. CNA blood c. BHI d. Thioglycollate broth
The different species within an ecosystem that interact in various ways make up a(n)
A) trophic level. B) ecotone. C) community. D) population. E) aggregation.
What microscope uses a metal-and-diamond probe to produce a three-dimensional image?
a) Atomic force microscope b) Darkfield microscope c) Phase-contrast microscope d) Transmission electron microscope
A child is brought to the hospital with a high fever, nausea, and vomiting, and complaining of headache. The cerebrospinal fluid collected by spinal tap is cloudy and contains spherical cells which stain Gram-positive. These signs and symptoms are
consistent with A) primary amebic encephalitis caused by Naegleria. B) cryptococcal meningitis due to infection with Cryptococcus neoformans. C) bacterial meningitis probably due to Streptococcus. D) tetanus resulting from infection with Clostridium botulinum. E) aseptic meningitis from infection with Neisseria meningitidis.