Answer the following question given this paragraph: 44.4 Aquatic Biomes Aquatic ecosystems include both saltwater and freshwater biomes. The abiotic factors important for the structuring of aquatic ecosystems can be different than those seen in terrestrial systems. Sunlight is a driving force behind the structure of forests and also is an important factor in bodies of water, especially those that are very deep, because of the role of photosynthesis in sustaining certain organisms. Density and temperature shape the structure of aquatic systems. Oceans may be thought of as consisting of different zones based on water depth and distance from the shoreline and light penetrance. Different kinds of organisms are adapted to the conditions found in each zone. Coral reefs are unique marine ecosystems that are home to a wide variety of species. Estuaries are found where rivers meet the ocean; their shallow waters provide nourishment and shelter for young crustaceans, mollusks, fishes, and many other species. Freshwater biomes include lakes, ponds, rivers, streams, and wetlands. Bogs are an interesting type of wetland characterized by standing water, lower pH, and a lack of nitrogen. Q: What kind of ph would you find in water from bogs? Choices: - normal ph - higher ph - regular ph - lower ph A:
lower ph

Answer the following question given this paragraph: Not all atoms of an element must have precisely the same mass. Atoms of one element can be transformed into another through nuclear reactions. The compositions of many solid compounds are somewhat variable. Under certain circumstances, some atoms can be divided (split into smaller particles). These modifications illustrate the effectiveness of the scientific method; later experiments and observations were used to refine Dalton's original theory. Q: Atoms of one element can be transformed into another through which process? Choices: - magnetic reactions - longer reactions - developed reactions - nuclear reactions A:
nuclear reactions

Answer the following question given this paragraph: Scientists think that protists are the oldest eukaryotes. Q: What do scientists think are the oldest eukaryotes? Choices: - arthropods - fungi - prokaryotes - protists A:
protists

Answer the following question given this paragraph: The expression of an organism's genotype is called its phenotype . The phenotype refers to the organism's traits, such as purple or white flowers. Different genotypes may produce the same phenotype. This will be the case if one allele is dominant to the other. Both BB and Bb genotypes in Table 6.1 have purple flowers. That's because the B allele is dominant to the b allele, which is recessive. The terms dominant and recessive are the terms Mendel used to describe his "factors. " Today we use them to describe alleles. In a Bb heterozygote, only the dominant B allele is expressed. The recessive b allele is expressed only in the bb genotype. Q: In a heterozygote with one dominant and one recessive allele, which is expressed? Choices: - dominant atoms - submissive allele - dominant elements - dominant allele A:
dominant allele