A(n) ____ consists of two or more bonded elements in proportions that never vary
a. ion
b. mixture
c. compound
d. network solid
e. satisfied orbital
C
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Which of the following is mismatched with regard to similar excellular structures in plant and animal cells?
A) elastins-extensins B) extracellular matrix-cell wall C) collagens-cellulose D) proteoglycans-hemicelluloses E) fibronectins-pectins
Net carbon uptake per unit time by a plant is directly related to
A) the difference between photosynthetic rate and respiration rate. B) photosynthetic rate. C) respiration rate. D) the difference between photosynthetic rate and decomposition rate.
When signal molecules bind to two tyrosine kinase receptors, the receptors move closer to each other
and form a monomer. __________________ Indicate whether the statement is true or false.
FtsZ, MreB, and CreS proteins regulate the shape and structure of bacterial (prokaryote) cells. These proteins are homologous to the ________ in eukaryotes.
A. cytoskeleton B. DNA processing enzymes C. cell wall D. organelles