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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.

HELPPp!ppppp?
i tried this already this wouldn't work to get suckerss to ans the questions break it up sure u will lose points but it worth it



21 process a nucleus..........50myocytes by the way these are easy questions google the ans the time wasted to type this could have gotten u the ans you must really be lazy and i am lazy so...
Reply:22-prokaryotes



do your homework buddy!
Reply:Sorry, I forgot to study my homework for this test...........