A controlled experiment is one in which
A. variables are allowed only in the control group.
B. only one independent variable is allowed in the experimental group.
C. all the variables are controlled.
D. dependent variables are introduced in the control group.
B. only one independent variable is allowed in the experimental group.
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In plant cells, the ____ provides cellular support and protects cells from pathogens
a. cytoplasm b. cell membrane c. cytoskeleton d. plasmodesmata e. cell wall
During sexual reproduction, Saccharomyces cerevisiae forms haploid spores that are enclosed in a sac. Therefore Saccharomyces is classified as a(n) ________.
A. basidiomycete B. ascomycete C. chytrid D. glomerulomycete E. cryptomycete
Which of the following statements concerning plasma cells is FALSE?
A) They live for many years and function as memory cells. B) They are descended from activated B cells. C) They can produce large quantities of antibodies on a daily basis. D) They secrete a single type of antibody molecule specific for a single epitope. E) The antibodies they produce can remain in circulation for weeks.
Moist heat is more efficient at killing microbes and is effective at lower temperatures or shorter exposure times than dry heat.
Answer the following statement true (T) or false (F)