Which protist has a belt-like flagellum that runs through a groove in the middle of its cell?
a. dinoflagellates
b. ciliates
c. apicomplexans
d. euglenoids
e. trypanosomes
a
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Prior to Darwin's book On the Origin of Species, people thought what about species?
A. Species changed over time because they were not adapted to their environment. B. Species were designed already perfectly adapted to their environment. C. Species evolved at one point, but no longer changed because they were not adapted to their environment. D. Species changed over time as guided by a divine creator.
Kidneys are thought to have evolved first among the _____________.
A. saltwater bony fishes B. amphibians C. reptiles D. mammals E. freshwater bony fishes
The seeds in a pod of one of Mendel's pea plants are:
A) produced only when a plant is cross-fertilized. B) genetically identical to each other but different from other peas in other pods. C) each the result of a separate fertilization event. D) genetically identical to each other and all other peas from that plant. E) produced only when a plant is self-fertilized.
All of the following are adaptations to remain stationary in the ever-shifting soft bottom of estuaries except:
a. extensive roots and rhizomes. b. holdfasts. c. sessile lifestyle. d. operculum. e. byssal threads.