The ____ stimulates forceful inhalation and exhalation
a. ventral interneuron group
b. pons interneuron groups
c. carotid bodies
d. dorsal respiratory group
e. aortic bodies
ANSWER: a
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A DNA sequence 5? ATGGGGGACACC 3? encodes the amino acids Met Gly Asp Thr. A mutation changes the sequence to 5? ATGAGGGGACACC 3? that encodes the amino acids Met Arg Gly His. What type of mutation has occurred?
A) frameshift mutation B) missense mutation C) silent mutation D) nonsense mutation
A testcross consists of
a. a cross of two pure-breeding forms to find out which form of a gene is dominant. b. a cross between two unknown forms to determine their genotypes. c. a cross between an offspring and its parent. d. a cross of an F1 hybrid to an individual that is homozygous recessive. e. a cross of two F2 individuals to produce an F3 generation.
An oak tree is a
A) gamete. B) spore. C) zygote. D) gametophyte. E) sporophyte.
Thermoduric mesophiles are often responsible for spoilage of improperly canned foods.
Answer the following statement true (T) or false (F)