Individuals with extra or missing copies of one or more chromosomes are called ____
a. polyploids
b. haploids
c. aneuploids
d. euploids
e. diploids
ANSWER: c
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For most multicellular eukaryotes, including humans, mitochondria are inherited
a. only from the father. b. from both the father and the mother. c. from the mother for females and from the father for males. d. randomly from either the father or the mother. e. only from the mother.
spermatidWhich structure contains 46 chromosomes?
a. egg b. zygote c. secondary oocyte d. polar body e. spermatid
Which step in translation initiation is unique to eukaryotes?
A) formation of the preinitiation complex B) formation of the initiation complex C) scanning D) ribosome assembly E) translocation of the ribosome in the 3? direction
Vascular plants and air-breathing animals first appeared during which time period?
a. Silurian period b. Permian period c. Cambrian period d. Ordovician period e. Cretaceous period