Which of the following statements concerning Down syndrome is FALSE?
a. Down syndrome involves nondisjunction.
b. Down syndrome individuals have 47 chromosomes per somatic cell.
c. Down syndrome incidence increases with increasing material age.
d. Down syndrome individuals have an extra chromosome 22.
e. Down syndrome is variable in expression.
D
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An interaction that benefits both participants is called a ____
Fill in the blank with the appropriate word.
Which organism is catalase positive, coagulase negative, pyrrolidonyl arylamidase (PYR) positive, susceptible to novobiocin, urease negative, and hemolytic on sheep blood agar?
a. S. epidermidis b. S. saprophyticus c. S. cohnii d. S. haemolyticus
Which lineage of Cnidarians exist primarily as cube-shaped medusae, are active swimmers, and produce one of the deadliest toxins made by animals?
a. Hydrozoa b. Trematoda c. Cubozoa d. Anthozoa
Special molecules such as NADH and FADH2 transport ________ in cells, which can then be used as energy in the cell
Fill in the blank(s) with correct word