21. All organisms classified as protists (1 point)
are heterotrophic.
are parasites.
possess a nucleus.
manufacture their own food.
22. Giant kelp form dense “forests†in the ocean. Kelp are classified as (1 point)
algae
prokaryotes.
protists.
fungi.
23. A group of organisms of different species living together in a particular place is called a
(1 point)
population.
community.
ecosystem.
biosphere.
24. The phylum Porifera includes (1 point)
sea squirts.
segmented worms.
starfish.
sponges.
25. The occurrence of the same blood protein in a group of species provides evidence that these species (1 point)
evolved in the same habitat
evolved in different habitats
descended from a common ancestor
descended from different ancestors
26. Muscles are connected to bones by bands of tissue called (1 point)
cartilage.
tendons.
sphincters.
ligaments.
27. A feeding structure called a radula is possessed by (1 point)
mollusks.
arthropods.
annelids.
chordates.
28. Most biologists consider these organisms the direct ancestors of land plants: (1 point)
Phylum Ciliophora – the ciliates
Phylum Basidiomycota – the club fungi
Phylum Chlorophyta – the green algae
Phylum Pyrrophyta – the dinoflagellates
29. An amniotic egg first evolved in (1 point)
fish.
reptiles.
echinoderms.
birds.
30. The organism that causes Athlete’s foot is a member of the kingdom (1 point)
archaebacteria
protista
eubacteria
fungi
31. Precipitation that becomes overly acidic contains harmful levels of these acids (1 point)
sulfuric and nitric acid.
hydrochloric and carbonic acid.
acetic and boric acid.
lactic and muriatic acid.
32. Tube feet and radial symmetry describe the phylum (1 point)
arthropoda
echinodermata.
nematoda.
cnidaria.
33. Natural selection could not occur without (1 point)
genetic variability in species.
interspecific competition.
environmental changes.
the ozone layer.
34. Bryophytes are ____ plants that include _____. (1 point)
nonvascular; mosses
nonvascular; ferns
vascular; mosses
vascular; ferns
35. Production of blood clots is the job of (1 point)
red blood cells.
plasma.
white blood cells.
platelets.
36. Which of the following organisms possesses jointed appendages, an open circulatory system, and an exoskeleton? (1 point)
a starfish
a snail
a spider
a tapeworm
37. The waxy covering that protects the leaves of plants and helps prevent water loss in the (1 point)
cell membrane.
cuticle.
stomata.
sori.
38. A relationship between a producer and consumer is best illustrated by (1 point)
a caterpillar eating a milkweed plant.
a frog eating a dragonfly.
a shark eating a scuba diver.
an owl eating a mouse.
39. Which feature is NOT shared by members of the phylum Chordata? (1 point)
a tail
gill slits
a notochord
a water vascular system
40. The organism called Euglena is a protist that (1 point)
swims by means of cilia.
is classified in the phylum Sporozoa.
is parasitic.
is both autotrophic and heterotrophic
41. Stems exhibit _____ and _____. (1 point)
positive phototropism and positive gravitropism
negative phototropism and positive gravitropism
positive phototropism and negative gravitropism
negative phototropism and negative gravitropism
42. In his “primordial soup†experiment, Stanley Miller did not add oxygen to the apparatus because (1 point)
it is not essential to most forms of life.
it does not react with ammonia, methane, or hydrogen.
it would have lead to the formation of microorganisms.
it was not believed to have been present in the Earth’s early atmosphere.
43. All of the following evolved from early reptiles except: (1 point)
amphibians
birds
snakes
mammals
44. The functional unit of the kidney where urine production occurs is called the (1 point)
bronchiole.
nephron.
Malpighian tubule.
collar cell complex.
45. The term deciduous refers to (1 point)
plants that show seasonal loss of leaves.
mushrooms that grow in large rings.
microscopic organisms that undergo photosynthesis.
life cycles that alternate between haploid and diploid forms.
46. If CFCs were banned by all countries, (1 point)
acid rain would be eliminated.
destruction of the ozone layer would stop quickly.
photochemical smog would be reduced in large cities.
chlorofluorocarbons already in the atmosphere would continue to destroy ozone for another century.
47. Frogs, toads, and salamanders are classified in the class (1 point)
amphibia.
reptilia.
aves.
Osteichthyes.
48. Who developed the system of classifying organisms by assigning them a genus and species name? (1 point)
Miller
Linnaeus
Darwin
Aristotle
49. Two categories of the flowering plants called angiosperms are (1 point)
conifers and cycads.
monocots and dicots.
mosses and liverworts.
mold and mildew.
50. Cells of the skeletal system are called (1 point)
osteocytes.
myocytes.
monocytes.
myofibers.
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