Enzymes supply the oxygen necessary for the reactions.
Enzymes change reactants from solid to liquid during the reactions.
The reactions take up too much space in the cell if enzymes are missing
The reactions are too slow to meet the needs of the cell if enzymes are missing.
The patient is allergic to milk
The patient stopped consuming milk products
A disease destroyed the lining of the patient’s small intestine
A mutation occurred in the gene that is responsible for producing lactase
The marker will only be found in the grain.
Both chickens and wolves will have the marker.
Wolves will have the marker, but chickens will not.
The marker will only be found in the animals' wastes.
Energy Pyramid A
Energy Pyramid B
Energy Pyramid C
Energy Pyramid D
Green water plants release a gas in the presence of light.
Roots of water plants absorb minerals in the absence of light.
Green plants need light for cell division.
Plants grow best in the absence of light.
It may be used as part of a sugar in a plant.
It may become part of a protein in an animal.
It may be consumed as a fossil fuel is burned.
It may be decomposed into carbon and oxygen by a bacterium.
A decrease in owls
An increase in hawks
An increase in mountain lions
A decrease in raspberry bushes
Increased rates of decomposition
Decreased use of atmospheric CO2
Decreased combustion of fossil fuels
Increased production of organic compounds
The luciferase gene mutated inside the cells.
The luciferase gene was transcribed and translated.
The luciferase gene destroyed the original genes of the cells.
The luciferase gene moved from the nucleus to the endoplasmic reticulum.
The mutation may produce a zygote.
The mutation may cause phenotypic change.
The mutation causes damage when it occurs.
The mutation creates entirely new organisms.
Giraffes stretching their necks to keep their heads out of reach of predators
Giraffes stretching their necks so they could reach food higher in the trees
A mutation in genetic material controlling neck size occurring in some skin cells of a giraffe
A mutation in genetic material controlling neck size occurring in the reproductive cells of a giraffe.
Most species of snakes live on land.
Snakes move extremely fast to catch their prey
Snakes have a well-developed backbone and muscular system.
Some species of snakes have limb buds during their embryonic development.
It indicates that forms of life existed on Earth at least 3.5 billion years ago.
It indicates the exact cause of structural and behavioral adaptations of organisms.
It shows how the embryos of many different vertebrate species are very similar.
It shows that the form and structure of groups of organisms have changed over time.
Predators on the main island can easily migrate to follow the populations to the other islands.
Lack of disease on the other islands enables the populations to grow and change without limit.
The physical separation of the islands limits gene flow and interbreeding between the populations.
The climatic conditions of the islands allow the populations to breed all year and produce several generations
He received a recessive allele from each parent
He received a dominant allele from each parent
He received a recessive allele from his mother and a dominant allele from his father
He received a dominant allele from his mother and a recessive allele from his father
Mitosis and natural selection
Extinction and gene replacement
Mutation and genetic recombination
Environmental selection and selective breeding