The biological species concept relies mainly on ________ to define a species.

A. reproductive isolation
B. the presence of analogous traits
C. comparative biochemical analysis
D. morphological differences


Answer: A

Biology & Microbiology

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When a shallow extension of the sea dries out it leaves salt deposits called:

a. participates. b. conglomerates. c. evaporites. d. rock salt. e. sedimentary layers.

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What is the term for when the fluid inside and outside of a cell has the same osmolarity?

a. Hypotonic b. Isotonic c. Hypertonic d. Catatonic

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Which of the following STDs are preventable through the use of a vaccine?

A. hepatitis A and HIV B. syphilis and vaginal infections C. HIV and gonorrhea D. hepatitis A and B E. hepatitis B and chlamydia

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A molecule composed of carbon and hydrogen is a compound.

Answer the following statement true (T) or false (F)

Biology & Microbiology