The ability to control defecation is because the anal sphincter is made of:
a. skeletal muscle
b. elastic connective tissue
c. fibrous connective tissue
d. tendon
e. cardiac muscle
a
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Examine the pedigree in the figure above, where individuals that have the genetic condition being
tested are marked with filled squares or circles. Which of the following inheritance patterns is most likely correct for this condition?
a. autosomal dominant b. X-linked recessive c. X-linked dominant d. cytoplasmic inheritance e. autosomal recessive
A molecule becomes reduced when it ________
a. gives up an electron b. is degraded into smaller products c. releases a hydrogen ion d. gains an electron
Fossils
a. are remains of organisms. b. are formed when organic materials are replaced with minerals. c. provide evidence of evolution. d. are all of the above.
When does a zygote become a multicellular creature?
a. at fertilization b. when cleavage begins c. when organs begin to form d. when the heart begins beating e. at birth