Explain the relationship between body size and multicellularity. What will be an ideal response?
Multicellularity provided the mechanism for an organism to increase in size. Because a cell’s size is
limited by its surface-to-volume ratio, an organism cannot increase in size simply by increasing the
size of its cells. Rather, body size increases by an increase in the number of cells.
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In animal cells, the extracellular matrix plays important roles in all of the following processes except
A) cell division. B) motility. C) DNA replication. D) differentiation. E) adhesion.
Primary active transport results in which of the following?
a. A charge difference across a membrane b. A pocket forming around target particles c. The formation of additional ATP d. The reduction in extracellular fluid
How is the placement of the eyes of a predator different from their placement on its prey?
What will be an ideal response?
Which of the hormones involved in the regulation of water-salt balance is produced by the juxtaglomerular apparatus?
A. renin B. ANH C. testosterone D. aldosterone E. ADH