Secondary succession is likely to occur in
a. a burned forest.
b. a shallow lake.
c. an abandoned field.
d. a burned forest and a shallow lake.
e. a burned forest, a shallow lake, and an
abandoned field.
Answer: e
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The three phylogenetic trees above all contain the same members, all have a common ancestor, but are divided up in three different ways. Which tree has members circled that are of several evolutionary lines and does not include the most recent common ancestor of the included lineages? What is this type of group is this?
A. Tree 3; polyphyletic.
B. Tree 2; polyphyletic.
C. Tree 1; monophyletic.
D. Tree 3; monophyletic.
E. Tree 2; paraphyletic.
What determines the development of male or female sex organs in the human embryo?
a. environmental factors
b. genes on the X chromosome c. genes on the Y chromosome d. genes on both the X and Y chromosomes e. neither the X nor Y chromosomes
Inhalation
a. causes the diaphragm to contract and move downwards. b. is an active process. c. causes the rib cage to move upward. d. causes the thoracic cavity to expand. e. does all of these
You mix sugar in water and stir until it's completely dissolved. In this system, the water is the ________, the sugar is the ________, and the end result is a ________
A) solute; solvent; solution B) solvent; solution; solute C) solute; solution; solvent D) solution; solvent; solute E) solvent; solute; solution