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JTikkanen has Authored 155 Questions  | A. they keep the planet warm enough for living things to survive B. nutrients and other life sustaining molecules are in limited supply and must be continually recycled C. energy flows through ecosystems in one direction only and is eventually dissapated as heat D. they remove poisons and keep them locked up in E. they prevent catastrophic extinctions . |
| A. food chain B. population C. community D. niche . |
| A. ecosystem, community, population, organism, biosphere B. organism, population, community, biosphere, ecosystem C. organism, population, community, ecosystem, biosphere . |
| A. corpus callosum B. hypothalmus C. cerebrum D. cerebellum . |
| A. a cell body, dendrites, and an axon B. a cell body, dendrites, and blood cells C. T cells, B cells, and plasma cells D. macrophages, Schwann cells, and an axon . |
| A. cytokinesis is unequal during the meiotic divisions B. the sequence from primary oocyte to ovum is interupted by a relatively long resting period C. the first meiotic division is not completed unless the egg is reactivated by a hormone D. a mature ovum has not yet completed its second meiotic division E. all the above . |
| A. pancreas B. adrenal gland C. salivary gland D. pituitary gland . |
| A. arteries carry blood away from the heart B. arteries carry oxygenated blood C. arteries contain valves D. arteries carry blood away frm capillaries . |
| A. gills B. lungs C. tracheal system D. the placenta . |
| A. pharynx. stomach, esophagus, small intestine B. esophagus, stomach, pharynx, small intestine C. pharynx, esophagus, small intestine, large intestine, stomach D. pharynx, esophagus, stomach, small intestine, large intestine . |
| A. ingestion, digestion, absorption, elimination B. digestion, ingestion, absorption, elimination C. ingestion, absorption, elimination, digestion D. ingestion, digestion, elimination, absorption . |
| A. movement B. structural support C. transport of gasses D. rapid communication . |
| A. smooth muscle B. simple cuboidal epithelium C. cardiac muscle D. skeletal muscle . |
| A. plants have diploid and haploid phases,and fungi have only haploid stages B. fungi have cell walls C. fungi are heterotrophs and plants are autotrophic D. plants produce spores . |
| A. a vascular system B. flowers C. a life cycle that involves alternation of generations D. seeds . |
| A. do not produce flowers B. have cones but no seeds C. have flagellated sperm D. lack vascular tissue . |
| A. golden algae B. angiosperms C. green algae D. red algae . |
| A. amoebas B. ciliates C. diatoms D. dinoflagellates . |
| A. photoheterotrophs B. chemoautotrophs C. photoautotrophs D. chemoheterotrophs . |
| A. bacilli B. vibrios C. spirochetes D. cocci . |
| A. is the belief that living organisms arise from noliving matter B. was proven by Louis Pasteur C. refers to generation X D. occurs when maggots appear in rotting meat . |
| A. are headed for extinction B. eveolved from the same ancestor C. have increased genetic diversity D. by chance had similar mutations in the past . |
| A. was a land mass that broke up to, eventually, form the present day continents B. is the idea that all life on Earth is related C. was an animal common in ancient seas, but is now extinct D. is the evolutionary history of species, family, or phylum . |
| A. Traits are inherited as discrete particles B. Earth is very old C. Population sproduce more offspring than their environment can support D. organisms compete for limited resources . |
| A. from RNA to DNA to protein B. From protein to RNA to DNa C. From DNa to protein to RNA D. From RNA to protein to DNA E. From DNA to RNA to protein . |
| A. ribosomes B. DNA C. nuucleotides D. enzymes . |
| A. Red is dominant B. Both red and white are recessive C. red and white show incomplete dominance D. pink is dominant, while red and white are recessive . |
| A. homozygous for two different genes B. heterozygous for two different genes C. recessive for three different genes D. triploid . |
| A. an independent assortment of chromosomes B. the formation of tetrads C. the exchange of homologous portions of nonsister chromatids D. making RNA copy of a DNA strand . |
| A. 23 B. 47 C. 2n D. 46 E. n . |
| A. Golgi apparatus B. Endoplasmic Reticulum C. mitochondria D. chloroplasts E. nucleus . |
| A. they make their own food from inorganic materials B. they are among the producers of the biosphere C. they are in the same nutritional catagory as some bacteria and protists D. they use light energy to drive the synthesis of organic molecules E. All of the above . |
| A. breaking down toxic molecules B. making ATP to power cell activities C. making food D. producing cell structures from chemical building blocks . |
| A. are proteins B. provide activation energy for the reations they facilitate C. change the rate of reation without being consumed by the reaction D. can make an endergonic reaction exergonic . |
| A. nucleolus B. nucleus C. goldi apparatus D. lysosomes E. rough endoplasmic reticulum . |
| A. chitin B. cellulose C. peptidoglycan D. chlorophyll E. none of the above . |
| A. water molecules are attracted to each other B. water molecules are used as a source of raw material to break down polymers and monomers C. water molecules are formed in the formation of polymers from monomers D. water molecules are attracted to each other and water molecules are formed in the formation of polymers to monomers E. none of these choices is correct . |
| A. contains hydrogen B. forms convalent bonds with other substances C. donates hydrogen ions to solutions D. is a versatile solvent E. removes hydrogen ions from solutions . |
| A. nucleus B. size; smaller things are more reactive C. protons D. neutrons E. electron configuration . |
| A. Bacteria B. Archaea C. Eukarya D. Fungi . |
| A. monera B. protista C. fungi D. plantae . |
| A. interphase B. mitosis C. meiosis D. telophse . |
| A. prokaryote B. animal C. plant D. fungus . |
| A. NaCl B. Cl2 C. Na D. Both Na and Cl2 . |
| A. electrons B. molecules C. ions D. atoms . |
| A. exponential growth B. lag phase C. stable equilibrium D. extinction phase . |
| A. stable equilibrium B. carrying capacity C. extinction D. exponential growth . |
| A. lipids B. carbohydrates C. enzymes D. proteins . |
| A. lipids B. amino acids C. glycogens D. enzymes . |
| A. 23 B. 46 C. 92 D. there is no way to tell . |
| A. producers B. Primary consumer C. Top consumer D. Autotrophs . |
| A. producers B. consumers C. decomposers . |
| A. 1% B. 10% C. 50% D. 100% . |
| A. the presence of a seed bank B. the colonization of bare rock C. pioneers like lichens D. Eutrophication . |
| A. renal tube B. urethra C. uterine tube D. ureter . |
| A. nephron B. loop of Henle C. urethra D. ureter . |
| A. aldersterone B. ADH C. insulin D. glucagon . |
| A. lymphocytes B. neutrophils C. basophils D. eosinophils . |
| A. vessel constriction B. termperature increase C. increased blood flow D. phagocyte attack . |
| A. anterior pituitary B. pancreas C. adrenal gland D. gonads . |
| A. pancreas B. anterior pituitary C. adrenal gland D. hypothalmus E. liver . |
| A. whales are older than the human species B. human species began life in the oceans C. human species and whales have common ancestry D. whales evolved from the human species . |
| A. overproduction of offspring B. survival of the fittest C. struggle for existence D. puntuated equilibrium . |
| A. protozoans B. coelenterates C. reptiles D. arthropods . |
| A. speciation B. geographic isolation C. gradualism D. puntuated equilibrium . |
| A. may have similar evolutionary histories B. are evolving into the same species C. contain identical DNA D. have the same number of mutations . |
| A. natural selection B. the disuse of body structures C. mutagenic agents D. the transmission of acquired characteristics . |
| A. Generally mass extincitons weed out the unfit species B. one of the earliest mass extinctions may have been caused by oxygen in the atmosphere C. humans are currently not causing mass extinction D. mass extinctions only effect small organisms . |
| A. Founder effect B. Stabilizing selection C. Allopatric speciation D. Mutation . |
| A. free living mitochondria still exist in some environments B. eukaryotes are earth's most primitive life form C. mitochondria and chloroplasts have their own DNA D. fossil evidence suggest early eaukaryotes ate proteobacteria . |
| A. RNA is more stable than DNA B. RNa is a simpler polypeptide than DNA C. the simplest life forms, viruses, use RNA D. RNa (ribozymes) has the ability to catalyze a few simpler chemical reactions . |
| A. 4 haploid cells --2 diploid cells B. 2 diploid cells-- 2 diploid cells C. 2 diploid cells--4 haploid cells D. 2 diploid cells--2 haploid cells E. 4 diploid cells--4 haploid cells . |
| A. production of eggs B. production of sperm C. multiplication of body cells D. decreasing number of chromosomes . |
| A. male--the sperm can fertilize a female egg or a male egg B. chromosome contribution form both parents--the offspring uses all the parents' chromosomes C. female--only the female has 2 functional sex chromosomes D. male--the male can contribute an X or a Y chromosome E. female--only the female provides cytoplasm to the zygote . |
| A. XY B. XX C. XXY D. XXX E. X . |
| A. 2 pairs of centrioles during prophase B. formed a cleavage furrow C. microtubles D. no crossing over E. formed a cell plate . |
| A. division of the cell outside nuclear material B. cell movement C. reduction in the number of chromosomes D. division in the nucleus E. division in the entire cell . |
| A. large cells containing many nuclei B. in inability to produce DNA C. a decrease in chromosome number D. a rapid rate of sexual reproduction E. division of the organism into many cells most lacking nuclei . |
| A. in metaphase of meiosis only B. in the G1 phase of interphase in reproductive cells only C. in the cytokinesis portion of the cell's life cycle D. in the S phase of interphase E. in the prophase of both mitosis and meiosis . |
| A. 16 chromosomes B. 32 chromosomes C. 32 pairs of chromosomes D. 64 pairs of chromosomes E. none of the above . |
| A. is limited to single cells organisms B. leads to loss of genetic materials C. is limited to plants D. produces offspring genetically identical to the parents . |
| A. sea water is isotonic to your body fluids and you will absorb to much water, causing your cells to burst B. one cup of sea water contains enough sodium to poison you C. sea water is hypertonic to your body tissues and drinking it will cause you to lose osmosis D. it contains toxic levels of iodine . |
| A. a protein B. an outside energy source C. a concentration gradient D. a membrane . |
| A. diffusion B. active transport C. crenation D. spontaneous combustion E. heat . |
| A. proteins embedded in two layers of phospholipid B. a layer of protein coating a layer of phospholipid C. phospholipids embedded in 2 layers of protein . |
| A. nonpolar heads--polar tails B. hydrophobic heads--hydrophilic tails C. hydrophilic heads--hydrophobic tails D. hydrophobic tails-- hydrophilic heads . |
| A. animal cells only B. animal cells and bacterial cells but not in plant cells C. neither plant or animal cells D. plant cells and some protists E. both plant cells and animal cells . |
| A. grana B. tubules C. stroma D. matrix E. cristae . |
| A. the ER B. lysosomes C. mitocondria D. the Golgi apparatus E. th nucleuolus . |
| A. flagella B. RNA C. ribosomes D. cell membranes E. mitochondria . |
| A. the nucleus B. the plasma membrane C. a ribosome D. the golgi apparatus E. a microtubule . |
| A. lysosome--movement B. vacuole--storage C. ribosome--manufacture of lipids D. nucleus--cellular respiration E. mitichondrion--photosynthesis . |
| A. bacteria are so small B. their organelles are small and packed tightly together C. with few organelles present bacteria are distinguished by differences in individual macromolecules D. electrons can penetrate tough bacterial cell walls E. Bacteria can move so quickly thay are to photograph . |
| A. 15 and 13 B. 7 and 8 C. 28 and 28 D. 14 and 14 . |
| A. endocytosis B. exocytosis C. osmosis D. diffusion . |
| A. Active transport B. Exocytosis C. Osmosis D. Phagocyntosis . |
| A. whether or not the cell carries out cellullar metabolism B. whetehr or not the cell contains DNA C. the presence of a rigid cell wall D. the presence of or absence of ribosomes E. whether or not the cell is partitioned by internal membranes . |
| A. none of these above B. hydrophillic C. hypotonic D. hypertonic E. isotonic . |
| A. cholesterol B. transmembrane proteins C. glycogen D. phospholipids E. glucose . |
| A. nucleus B. chloroplast C. smooth ER D. golgi apparatus (body) E. mitochondrion . |
| A. an algal protisan cell B. a bacteria C. a cell from a plant D. a cell from a mouse E. a cell from a fungus . |
| A. 16 chromosomes B. 8 chromosomes C. 4 chromosomes D. 2 chromosomes . |
| A. meiosis B. mitosis C. binary fission D. syngamy . |
| A. Anaphase, prophase, metaphase, telophase B. Metaphase, anaphase, telophase, prophase C. prophase, metaphase, anaphase, telophase . |
| A. Prophase B. anaphase C. Metaphase D. None of these . |
| A. chromosome pairing B. polar body formation C. unequal division of the cytoplasm D. yolk accumulation . |
| A. they are dipoid as a result of mitotic division B. they are genetically identical to the primary sex cells C. they contain the monoploid (haploid) number of chromosomes D. they are larger than egg cells . |
| A. one diploid cell only B. four diploid cells C. one monoploid or haploid cell only D. four monoploid or haploid cells . |
| A. centriole B. centromere C. centrosome D. cell plate . |
| A. 2 cells each with 1 nucleus B. 2 cells each without a nucleus C. 1 cell with 2 identical nuclei D. 1 cell without a nucleus . |
| A. cyclosis B. pinocytosis C. phagocytosis D. diffusion . |
| A. active transport B. passive transport C. osmosis D. diffusion . |
| A. centriole B. cell wall C. vacuole D. nucleus . |
| A. nucleotides and amino acids B. proteins and lipids C. DNA and ATP D. chitin and starch . |
| A. nucleus B. nucleolus C. chromosomes D. genes . |
| A. sunlight B. wind C. organic compounds D. water E. hydrothermal vents . |
| A. cansciousness B. habituation C. circadian rythyms D. imprinting E. trial-and -error learning . |
| A. The number of individuals of the species the environment will support B. the same as its habitat C. the way the animal fits into its environment D. its den or nest E. its position on the food chain . |
| A. a surface exposed by a retreating glacier B. abandoned farmland C. an abandoned city D. a neglected yard E. none of these is a starting point for primary succession A |
| A. I B. II C. III D. I and II E. I and III III |
| A. desert B. temperate broadleaf forest C. chaparral D. coniferous forest E. savanna Dry |
| A. producer B. primary consumer C. secondary consumer D. tertiary consumer E. detritivore Eats decomposing plants and animals |
| A. It is the population density of humans as calculated on per country basis B. it is the measure of habitat destruction C. it is the Earth's capacity for humans D. it is the amount of land required to support a single individual E. It is the average shoe size of the individuals population 18 |
| A. a population grows rapidly B. the size of the population remains constant C. density-dependent factors do not affect the population D. a population is in danger of extinction E. a population goes through up and down cycles same rates |
| A. sunlight and carbon dioxide B. calcium and iron C. sodium and potassium D. oxygen and carbon dioxide E. nitrogen and phosphorus Phytoplankton |
| A. water B. your friend C. rocks D. temperature E. oxygen come into contact with |
| A. circadian rythyms B. kinesis C. positive rheotaxis D. migration E. taxis migration |
| A. contains more prereproductive than reproductive individuals B. has an equal birth rate and death rate C. is near carrying capacity D. shows a clumped pattern of dispersion E. is limited only by density dependent factors More reproduction possibilities |
| A. tropical habitiats B. desert habitats C. temperate habitats D. tundra E. taiga Rainforests |
| A. increases rapidly B. increases slowly C. decreases slowly D. decreases rapidly E. fluctuates around a median number Capacity |
| A. Humans pollute the atmosphere and bodies of water B. Plants, algae, and photosynthetic bacteria obtain enrgy from sunlight, and heat, escapes from the biospere into space C. the precipitation that falls on the interior of the western North America is derived from the Pacific Ocean D. Bacteria that live on snowy mountains receive nutrients blown to them by winds Sunlight is not part of the Earth |
| A. Tundra B. Temperate Forest C. Taiga D. Desert Tundra |
| A. conservation biology B. in situ conservation C. ecology D. environmental architecture Conservation |
| A. Density-dependent B. Clumped C. Exponetial D. random E. uniform CLumping where the resources are |
| A. Tundra B. Savanna C. Broadleaf rainforest D. Taiga E. Tropical rain forest see biomes |
| A. if it is limited only by density - dependent factors B. until it reaches capacity C. if there are no limiting factors D. if it is a population with an equilibrial life history no limits |
| A. stratosphere B. lithosphere C. biosphere D. hydrosphere biosphere |
| A. predation B. competition C. parasitism D. mutualism Human is the predator |
| A. habitat destruction B. global warming C. predation D. the greenhouse effect E. thinning of the ozone layer Over half of the rainforests have diappeared over the last 200 years due to human expansion |
| A. DDT Contamination of human milk B. an increase in food supply C. DDT-resistant pests D. an increase in the incidence of maleria E. reduced survival rate of predatory birds see DDT Contamination |
| A. evolution B. speciation C. primary succession D. eutrophication E. secondary succession the first effects |
| A. in competition with one another B. dependent on one another C. in co-operation with one another D. unaffected by one another they must compete to survive |
| A. wildlife refuges B. herbicides C. sex hormones D. pesticides attracting insects with their own sex hormones or phermones and then trapping them is an example of biological control because you use only a natural mechanism of attracting them. |
| A. Pioneer trees B. weeds C. lichens D. schrubs a lichen is a pioneer organism, one of the first to inhabit an area |
| A. carnivore-herbivore relationship B. abiotic factors C. symbiotic factors D. biotic factors abiotic factors are nonliving factors in an ecosystem such as the amount of water, light, PH, temperature, etc. These are climatic conditions that control what plants can live there. |
| A. community B. population C. species D. phylum they all co exist and benefit from the relationship. they are not all the same |
| A. plant parasitism B. animal parasitism C. commensalism D. mutualism they both benefit |
| A. producer, carnivore, heterotroph B. producer, herbivore, decomposer C. predator, autotroph, herbivore D. predator, carnivore, consumer finds the prey,devours the creature and receives nourishment |
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