Flatworms lack
A) the ability to move.
B) a respiratory system.
C) a reproductive system.
D) a digestive cavity.
E) a nervous system.
B
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The distance between the crests of two
successive waves of light is called
a. wave frequency. b. wave period. c. wave distance. d. wavelength. e. wave space
All gills
a. consist of overlapping rows of filaments. b. are external. c. are paired. d. are associated with a blood transport system. e. fit all of these descriptions.
A fertilized egg can develop into all the types of cells in the body and is therefore considered to be _____
a) totipotent b) pluripotent c) unipotent d) multipotent
Which of the following correctly illustrates the sequence of the origin of modern groups of plants?
A) gymnosperms, ferns, bryophytes, angiosperms B) bryophytes, ferns, gymnosperms, angiosperms C) bryophytes, ferns, angiosperms, gymnosperms D) ferns, gymnosperms, angiosperms, bryophytes