The binding of nonsister chromatids by a synaptonemal complex draws the homologs into close contact so that what process can occur?
A) cytokinesis
B) karyokinesis
C) independent assortment
D) synapsis
E) disjunction
D
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_______ bind ferric iron and transport it into a bacterial cell.
Fill in the blank(s) with the appropriate word(s).
The five-toed limb of stem reptiles became modified
into a limb __________ in vertebrates that followed. a. suitable for high-speed running b. suitable for digging c. suitable for swimming d. with four fingers and an opposable thumb e. with all of these
Select the correct sequence of animal developmental events
a. fertilization >>> cleavage >>> gastrulation >>> morula b. fertilization >>> cleavage >>> morula >>> gastrulation c. cleavage >>> morula >>> gastrulation >>> fertilization d. morula >>> fertilization >>> gastrulation >>> cleavage e. fertilization >>> morula >>> gastrulation >>> cleavage
What is the function of tight junctions?
a. to seal the spaces between cells b. to give the cell its shape c. to allow ions and small molecules to pass between cells d. to allow cells to communicate with each other