Nitrogen-fixing bacteria in soil can convert excess nitrogen into which can contaminate groundwater. a/an forms around a well when the water table begins to slope toward the well. the water in an artesian well comes from a/an aquifer. a well not only has to reach the but also has to go deeper. in most aquifers, the materials that make up the aquifer are relatively which means they aren’t chemically reactive aquifers are most prone to pollution. the two primary components of a septic system are a septic tank a/an groundwater that comes to the surface naturally is known as a/an (there are no options. its just putting the word that goes in the sentence)
Answers: 2
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How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.
Answers: 1
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If a human has 23 pairs of chromosomes in every muscle cell of its body how many chromosomes will be in a human egg or sperm
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Which statements about a food chain are true? choose all answers that are correct. a.plants are the first living organisms in food chains on land. b. the plants in a food chain are called herbivores. c. all food chains on land begin with energy from the sun. d. carnivores in a food chain eat only plants.
Answers: 1
Nitrogen-fixing bacteria in soil can convert excess nitrogen into which can contaminate groundwater...
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