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.

Biology & Microbiology

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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

Biology & Microbiology

How is the placement of the eyes of a predator different from their placement on its prey?

What will be an ideal response?

Biology & Microbiology

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

Biology & Microbiology

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.

Biology & Microbiology