Discard those results and repeat the experiment.
Accept the hypothesis and exclude data that does not fit.
Reject the hypothesis and assume it is incorrect.
Create a new hypothesis and a new experiment to test it.
A fatal disease infected the rabbits.
Area farmers set traps for coyotes.
The average temperature decreased by 0.5 oC.
The average monthly rainfall increased by 0.25 in.
Type of cough syrup
Flavor of the cough syrup
Number of people taking each cough syrup
Number of days people take each cough syrup
Yes, because they can reproduce.
Yes, because they are composed of cells.
No, because they cannot adapt to their environment.
No, because they are not composed of cells.
Muscle, erythrocyte, lipid, mitochondrion, carbon
Carbon, lipid, erythrocyte, mitochondrion, muscle
Muscle, mitochondrion, lipid, erythrocyte, carbon
Carbon, lipid, mitochondrion, erythrocyte, muscle
Electrons
Neutrons
Photons
Protons
The concentration of hydroxide ions (OH-) will increase.
The concentration of hydrogen ions (H+) will increase.
The pH will not change.
The pH will increase.
It expels excess water using contractile vacuoles.
It expels excess sodium using the sodium-potassium pump.
It absorbs additional water through osmosis.
It absorbs additional sodium through facilitated diffusion.
Golgi apparatus
Lysosome
Mitochondrion
Ribosome
To produce 2 cells, each with 1 complete set of chromosomes
To produce 2 cells, each with half the normal number of chromosomes
To produce 4 cells, each with 1 complete set of chromosomes
To produce 4 cells, each with half the normal number of chromosomes
Lactic acid and ATP
Oxygen and lactic acid
Carbon dioxide and ATP
Oxygen and carbon dioxide
Water molecules move out of the cells.
Water molecules move into the cells.
Salt ions move out of the cells.
Salt ions move into the cells.
The molecules may exist as isomers.
The backbone is linear, cyclic, or branched.
Ionic bonds are present between the atoms.
Functional groups, such as alcohols, are present.
Covalent
Hydrogen
Intermolecular
Ionic
Its small size
Its solubility in water
Its ability to form hydrogen bonds
Its phosphate-phosphate bond
Amino acid
Deoxyribose
Glycerol
Nitrogenous base
Father
Mother
Daughter
Elder son
Autosomal dominant
Autosomal recessive
Sex-linked dominant
Sex-linked recessive
Chromosome number is reduced during telophase I so gametes have half the standard number of chromosomes.
The arrangement of homologous chromosomes during metaphase I varies from cell to cell.
Centromeres break apart during anaphase II so that sister chromatids can move to opposite poles of the cell.
DNA is replicated during interphase before chromosomes condense and become attached to kinetochores.
Metaphase I
Anaphase I
Prophase II
Metaphase II
The genotype of both of the cow's parents.
The genotype of the cow's hair color.
The phenotype of both of the cow's parents.
The phenotype of the cow's hair color.
Directional selection
Disruptive selection
Random selection
Stabilizing selection
The hind limbs adapted into flippers to help the whale swim faster.
Random chance and genetic drift led to the reduction in size of hind limbs.
Whales with shorter hind limbs swam faster than those with longer hind limbs.
Some whales lost longer hind limbs to predators and passed that trait to their offspring.
It is heritable.
It varies among individuals.
It increases individuals' life spans.
It influences individuals' reproductive success.
Mutations in gametes are passed to offspring.
Protein mutations cause DNA changes, creating new species.
Genetic mutations form when similar species mate and reproduce.
Somatic cell DNA mutations create new phenotypes in the population.
Air could enter the flasks, but no microorganisms could enter.
No air could enter the flasks, but microorganisms could enter.
Neither air nor microorganisms could enter the flasks.
Both air and microorganisms could enter the flasks.
9/16
1/4
3/16
1/16
Circulatory
Endocrine
Immune
Nervous
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Cellulose, inside the cell membrane
Cellulose, outside the cell membrane
Glucose, inside the cell membrane
Glucose, outside the cell membrane
The Calvin cycle uses high-energy molecules formed within the thylakoid membrane to convert carbon dioxide into sugar molecules.
The Calvin cycle uses sugar molecules formed within the thylakoid membrane to generate high-energy molecules.
The processes in the thylakoid membrane use high-energy molecules formed during the Calvin cycle to convert carbon dioxide into sugar molecules.
The processes in the thylakoid membrane use sugar molecules formed during the Calvin cycle to generate high-energy molecules.
Carpel
Petal
Sepal
Stamen
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Monerans only
Protists only
Monerans and protists
Viruses and monerans
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Cell membrane
Chloroplast
Mitochondrion
Nucleus
Both show exponential growth, but P. caudatum has a higher rate of increase.
Both show logistic growth, but P. caudatum has a higher rate of increase.
P. caudatum shows exponential growth, but P. bursaria shows logistic growth.
P. bursaria shows exponential growth, but P. caudatum shows logistic growth.
Competitive
Mutualistic
Parasitic
Predatory
Apple tree, deer, and wolf
Cactus, snake, and hawk
Grass, mouse, and coyote
Pine tree, moose, and bear
A seagull hatched from an egg laid on the island
A palm tree grown from a coconut that washed onto shore
Lichen spores deposited on rocks by the wind
Insect larvae carried on a piece of driftwood
180 J
18, 000 J
1, 800 J
18 J
Class
Family
Kingdom
Order
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