At the level of the cell, how is osmoregulation achieved?
A. by the movement of solutes across
membranes
B. by balancing the input and output of water
and electrolytes
C. by changing the overall permeability of
membranes
D. by bringing water in through the skin
E. None of these choices accurately describe
how osmoregulation is achieved at the level
of the cell.
A
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The three phylogenetic trees shown here all contain the same members and all have a common ancestor, but are divided up in three different ways. Which tree has members circled that are of more than one evolutionary line and does not include the most recent common ancestor of the included lineages? What type of group is this?
A. Tree 1; monophyletic.
B. Tree 2; polyphyletic.
C. Tree 2; paraphyletic.
D. Tree 3; monophyletic.
E. Tree 3; polyphyletic.
Overproduction of the mineralocoticoid ______ causes excessive water retention
a. cortisol b. aldosterone c. epinephrine d. catecholamine e. ADH
________ glands are a form of epithelial tissue that secretes substances through a duct
Fill in the blank(s) with correct word
Visible, clear, well-defined patches in a monolayer of virus-infected cells in a culture are called
A. lysogeny. B. plaques. C. pocks. D. budding.