TRUE OR FALSEA bacterium is an organism composed of a single cell.TA prokaryote does not have a nucleusTA eukaryote contains an organized nucleus.TThe largest group of archae are the halobacteria. F

Methanogens produce a lot of hydrogen and nitrogen gases.F6. Thermoacidophiles thrive in harsh environments of extreme heat and extreme acid. TDNA is the substance of heredity.T8. DNA molecules are scattered in the cell.F

9. The rod-shaped bacteria are known as streptococci.FBacteria reproduce through binary fission. TPhotosynthetic bacteria are autotrophs. TSome prokaryotes move by means of flagella.TThe archaea is known as the true bacteria.FBacillus causes tuberculosis.T

Streptococcus can cause tetanus.FMost eubacteria are heterotrophs.TPathogenic bacteria are helpful to man. F18. Manufacturers of vinegar, butanol and lactic acid depend on the action of bacteria.T19. Bacteria are used to ripen cheese and improve the flavour of Swiss cheese.T

20. An ecosystem is self-sustaining.TRivers, oceans and seas are lentic ecosystems.FThe diplococci occur in pairs.T23. Bacteria reproduce through spores.F24. Bacteria that cause disease are parasites.T25. Some eubacteria are autotrophs.T

26. Nitrifying bacteria are chemosynthetic.T 27. Nitrobacter are photosynthetic.F28. Myxobacteria are the slime bacteria.T29. Pathogens are healthy bacteria.FReproduction is the only function of viruses.T

Crop lands, aquariums and parks are artificialecosystemsTFood chains always begin with autotrops.TDecomposers are abiotic componentsFChytrids are best classified as fungi. FThe chloroplasts enable Euglena to carry out heterotrophic nutrition.F

When two gametes fuse, a zygospore is formed. F 37. Ecology studies the interrelationships between living species and their environment.T38. Energy flows through an ecosystem.FMost of the suns heat is absorbed on earth.F40. The science of genetics has made tremendous advances since the 1960s.T

41. Gregor Mendel began the first organized and mathematical study of how traits are inherited.T42. Hybrids are offsprings which are not pure.T43. A population refers to all the members of a given species that live in a particular location.T

44. Genotype refers to traits that we can see.F45. Heterozygous genetic makeup means mixed.TRecessive traits are those that show up in F1 generation.FThe 3:1 ratio is known as the phenotypic ratio.TThe genotypic ratio is 1:2:2.F

Producers can make their own food.T50. Secondary consumers are directly dependent on the producers.F51. Herbivores are plant-eaters. T52. Decomposers form another important part of ecosystems.T

53. When genes change or mutate, the traits they control also change.TAn allele is an alternative form of a gene that occupies a given place on a chromosome.TDNA has no effect in the chromosome structure of all cells.F The unit of structure and function in the nucleic acid is called a nucleotide.T

A six carbon sugar is called ribose.FA niche is a feeding pattern exhibited by species that compose a community.T 59. The flow of energy can be studied through food chains.T60. The protein bases with single rings are pyrimidines.TThe protein bases with double rings are purines.T

62. The Watson-Crick model of DNA indicates that the DNA molecule is shaped like a half moon.FDNA can make more of itself in a process called replication. TThe DNA molecule carries coded instructions for controlling all functions of the cell. T65. All living beings are dependent on other living beings.T

66. Human activities have upset the ecological balance in nature.F 67. A population is made up of limited members of a species that live in a given location.F68. All of the genes that can be inherited in a population are called the gene pool.TThrough genetic engineering, scientists can transfer genetic information from one organism to another.T

70. Symbiosis means living together.T71. 72. The food pyramid is another way of illustrating energy flow in an ecosystem.T73. The relationship between a crocodile and a bird is mutualism.T74. A suckerfish attached to the underside of a shark is a parasite.F

An herbivore is also classified as a tertiary consumer.F76. A group of populations living in a place is an ecosystem.F77. Predators hunt other animals for food.T78. Transpiration is water loss due to evaporation.TCarbon dioxide is released by plants during photosynthesis.F

80. The living factors in the environment are known as biotic factors.T81. A geographical area having one type of species is a population.TTertiary consumers are those that feed on smaller herbivores.FMutualism results when two species share the same habitat. F

84. About 80% of the air is oxygen.F85. Nitrogen is also fixed by lightning.T86. Global warming is a gradual and sustained increase in the earths surface temperature.TTertiary consumers feed on smaller herbivores.T

88. Oil, coal and natural gas are renewable.F89. Primary consumers are plants.FEach stage in the food chain represents a feeding or trophic level.T91. Hybrids are pure offsprings.F92. Trophic levels are ranks in the feeding hierarchy.F

93. About 80% of the air is oxygen.F94. Nitrogen is also fixed by lightning.T95. Global warming is a gradual and sustained increase in the earths surface temperature.T96. Tertiary consumers feed on smaller herbivores.T97. Oil, coal and natural gas are renewable.F

98. To germinate means to contaminate.F99. When two gametes fuse, a zygospore is formed.T100. Pioneer organisms that can inhabit bare rocks are lichens.T

IDENTIFICATIONAn organism composed of a single cell (bacteria)A cell that does not have a nucleus or other membrane-bound organelles(prokaryote)A cell that contains an organized nucleus and other membrane-bound organelles (eukaryote)The substance of heredity (DNA)Salt-loving bacteria(halophiles)They thrive in extremes of heat(thermophiles)

Bacteria that can cause tetanus(clostridium)Bacteria that can cause tuberculosis(bacillus)They thrive in environments of extreme heat and extreme acid.(thermoacidophiles)True bacteria(eubacteria)Round bacteria(cocci)Rod-shaped bacteria(bacilli)Spiral-shaped bacteria(spirilla)Organisms that feed on dead organic matter (saprophytes)Also known as slime bacteria (myxobacteria)

16. Bacteria that cause disease in humans, animals and plants(pathogens)17. Bacteria that can cause tuberculosis(bacillus)18. The only function of viruses (reproduction)19. first animals(protozoa)20. Cell arising from the fusion of gametes (zygote)21. Protozoa that have one or more flagella(mastigophora)22. Amoeboid protozoa(sarcodina)23. Flowing extensions of the protozoan body that aids in movement (pseudopods)

24. An organism that obtains food by absorbing dead organic matter(fungus)25. plant-like protists(euglenophyta)Diploid cells that lack flagella (diatoms) organisms that obtain food from other organisms (heterotrophs)28. A tough nitrogen-containing polysaccharide that is present in the exoskeletons of insects(chitin)Relationship between two different organisms that live together (symbiosis) When the relationship is of mutual benefit to both species (mutualism)

31. Offsprings which are not pure(hybrids)32. Traits that are visible(phenotype)Genetic makeup of a species(genotype) species with mixed genetic make up(heterozygous) 35. Trait that shows up in the F1 generation (dominant)36. Trait that is hidden(recessive)The conditions that make for dominance and recessiveness(factors)The actual carriers of genetic traits(genes)

39. Diagrammatic device used to predict the genotypic and phenotypic ratios that will result when gametes fuse(Punnett square)40. Changes in genes(mutations)41. A loss of a piece of chromosome(deletion)42. When a broken piece of chromosome sticks on to another chromosome(duplication)When the sequence of the gene was changed(inversion)44. Changes in individual genes (point mutations)

45. A condition in which cells develop extra sets of chromosomes(polyploidy)46. A person who carries the defective gene on a sex chromosome but is not afflicted with the disease(carrier)47. An alternative form of a gene that occupies a given place on a chromosome(allele)48. Protein bases with single rings(pyrimidines)49. Protein bases with double rings(purines)50. Hardened resin of trees(amber)

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