When a DNA sequence is permanently rendered inaccessible to transcription via methylation and
chromatin modifications, we call this
a. silencing.
b. imprinting.
c. a Barr body.
d. inactivation.
e. quiescence.
B
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Eukaryotic cells contain membrane bound _____________________ in their cytoplasm
Fill in the blank(s) with the appropriate word(s).
Four of the following five events shuffles existing alleles into different combinations in sexually reproducing
organisms. Which one is the exception? a. changes in chromosome number b. mutation c. independent assortment of chromosomes d. crossing over e. fertilization
Which statement about microsporidia is FALSE?
a. They are parasitic. b. Some divide by binary fission. c. They are classified with the zygomycetes. d. They have mitochondria and Golgi complexes
e. They have a feeding stage and a reproductive stage.The rapid appearance of animals in the fossil record occurred during the Ediacaran radiation
____________________ Indicate whether the statement is true or false.