The extensive infolding of eukaryotic membranes
form structures that allow for
a. the concentration of nutrients.
b. greater surface area for metabolism.
c. the transport of proteins.
d. the protection of metabolic machinery.
e. all of these.
Answer: e
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Subphylum _______ includes scorpions and spiders, which have special additional appendages that are used mostly for feeding.
a. Chelicerata b. Hexapoda c. Myriapoda d. Crustacea
Communication between animal cells is facilitated by
A) tight junctions. B) gap junctions. C) adhesive junctions. D) plasmodesmata. E) gap and adhesive junctions.
What would occur if the mother's immune system recognized the syncytiotrophoblast as a foreign tissue?
What will be an ideal response?
Which of the following options correctly lists the order of the four main processes that occur in the urinary system?
A) filtration, excretion, reabsorption, secretion B) excretion, filtration, reabsorption, secretion C) filtration, reabsorption and secretion occurring simultaneously, excretion D) reabsorption and secretion occurring simultaneously, excretion, filtration