An invasive species:
A. is any non-native species that has been
introduced to an ecosystem.
B. is always the competitively dominant
species in an ecosystem.
C. is any species that has been genetically
modified by man.
D. is any species that causes disease and
death in host organisms.
E. is any species that has a negative impact
on community diversity.
A
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To ensure maximum production of desired metabolites, it is always necessary to maintain organisms in active logarithmic growth.
Answer the following statement true (T) or false (F)
A group of individuals born in the same period of time is called a(n) ________
Fill in the blank(s) with correct word
What is the infectious agent?
•Amylase digests carbohydrates; tissue filtrate still infects healthy test animal. •Lipase digests fats; tissue filtrate still infects healthy test animal. •Formaldehyde and/or heat denatures DNA and RNA; tissue filtrate still infects healthy test animal. •Trypsin digests protein; tissue filtrate does not infect healthy test animal. Select one: a. carbohydrate b. fat c. protein d. DNA or RNA e. Could be carbohydrate, fat, or DNA or RNA but not protein.
What is the definition of a true pathogen?
A) causes disease within one week of infecting the patient B) must cause diarrhea, vomiting, and fever in the patient C) needs to passed from one person to the next D) does not require a weakened host to cause disease E) can only be a bacteria or a virus