If the concentration of solutes in a cell is less than the concentration of solutes in the surrounding fluid,
then the extracellular fluid is said to be:
a. hypertonic.
b. hypotonic.
c. isotonic.
d. stable.
e. amphipathic
A
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Some invertebrates do not have special respiratory organs and rely on __________ exchange, which involves the
diffusion of gases across the body surface. Fill in the blank(s) with the appropriate word(s).
Recombinases mediate transcript processing from pre-mRNA to mature mRNA
Indicate whether the statement is true or false
Which of the following signal molecules binds to nuclear receptors?
a. Thyroid hormone b. Vitamin D3 c. Retinoic acid d. Estrogen
If it were found that all animals except the Parazoa had a particular set of genes, one could conclude
A. that those genes probably are related to the embryonic formation of tissues. B. that Darwin was incorrect in his idea about descent with modification. C. that those genes are not useful in interpreting phylogeny. D. that those genes are related to cell wall formation. E. that the Parazoa are not animals.