Which of the following would be easiest to observe contamination after incubation?

A) A liquid broth culture in a test tube
B) Isolated colonies on an agar plate
C) Confluent growth (total coverage without isolated colonies, aka a "lawn") on an agar plate
D) Growth on an agar slant


B) Isolated colonies on an agar plate

Biology & Microbiology

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A flower with carpels and stamens but no petals or sepals is ____

a. perfect and incomplete b. imperfect and complete c. imperfect and incomplete d. perfect and complete e. sterile

Biology & Microbiology

To which of the following is a megaspore most closely and completely related?

a. female gametophyte b. seed c. ovule d. egg e. endosperm

Biology & Microbiology

____ promote cancer development, while ____ prevent cancer development

a. Oncogenes; tumor suppressor genes b. Tumor suppressor genes; homeobox genes c. Tumor suppressor genes; oncogenes d. Oncogenes; homeobox genes e. Homeobox genes; proto-oncogenes

Biology & Microbiology

Slime molds are nonphototrophic protists that

a. contain cell walls. b. can form fruiting structures. c. can form masses of protoplasm. d. can form either fruiting structures or masses of protoplasm.

Biology & Microbiology