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
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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.
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
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
A molecule composed of carbon and hydrogen is a compound.
Answer the following statement true (T) or false (F)