A female chicken egg that has been fertilized by a rooster is an example of
A. differentiation.
B. external fertilization.
C. indirect development.
D. direct development.
E. internal fertilization.
E. internal fertilization.
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Enrichment cultures can be established by placing the inoculum into selective media and incubating under specific conditions
Indicate whether the statement is true or false.
Phytochemicals are
a. essential for survival. b. produced in laboratories exclusively. c. not essential but can prevent some disorders. d. cofactors for cellulose degradation. e. none of these
Cestodes are often transmitted via which of the following?
A) aerosols B) open wounds in the skin C) undercooked meats D) water
How many different types of bases are used to encode all the genetic information in a molecule of DNA?
A) 20 B) 4 C) 2 D) 5 E) 10