Which of the following would not be a "control" in an experimental procedure?
A. a normal group
B. an experimental group
C. a known standard of comparison
D. a placebo group
E. a "zero-value" group
B. an experimental group
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Semen is a mixture of sperm and fluids from which accessory glands?
a. seminal vesicles and prostate gland only b. prostate gland and bulbourethral gland only c. seminal vesicles, prostate gland, and bulbourethral gland d. bulbourethral gland and seminal vesicles only
Class Reptilia includes all reptiles, and Class Aves includes all birds. However, a cladistics approach would place birds in the same class with reptiles
Why would a cladistician classify birds and reptiles in a single class despite the behavioral and physical differences between the two?
The introduction of invasive species may increase the environmental resistance for a native species
Indicate whether the statement is true or false
Which of the following is TRUE of cardiac muscle?
A) It is under voluntary control. B) Its cells contain large numbers of mitochondria. C) Its cells are tapered at each end. D) It is not striated, like skeletal muscle.