Answer the following question given this paragraph: All volcanoes share the same basic features. First, mantle rock melts. The molten rock collects in magma chambers that can be 160 kilometers (100 miles) beneath the surface. As the rock heats, it expands. The hot rock is less dense than the surrounding rock. The magma rises toward the surface through cracks in the crust. A volcanic eruption occurs when the magma reaches the surface. Lava can reach the surface gently or explosively. Q: When magma reaches the surface through cracks in the earth's crust, what occurs? Choices: - volcanic explosion - magma eruption - tsunami - volcanic eruption A:
volcanic eruption
Answer the following question given this paragraph: Figure 19.4 Survivorship curves show the distribution of individuals in a population according to age. Humans and most mammals have a Type I survivorship curve, because death primarily occurs in the older years. Birds have a Type II survivorship curve, as death at any age is equally probable. Trees have a Type III survivorship curve because very few survive the younger years, but after a certain age, individuals are much more likely to survive. Q: Survivorship curves show the distribution of individuals in a population according to what metric? Choices: - weight - height - birth rate - age A:
age
Q: Answer the following question given this paragraph: Ribosomes are produced in the nucleolus, and then transported to the cytoplasm. Ribosomes are made of ribosomal proteins, called ribonucleoproteins , and ribosomal RNA (rRNA). Each ribosome has two parts, a large and a small subunit, as shown in Figure below . The subunits are attached to each other. During translation, the smaller subunit binds to the mRNA, while the larger subunit binds to the tRNA with attached amino acids. When a ribosome finishes reading an mRNA molecule, the two ribosomal subunits disassociate. Q: Ribosomes are produced in the nucleolus, and then transported to the what? Choices: - cerebellum - nucleus - cytoskeleton - cytoplasm A:
A: cytoplasm
Question: Answer the following question given this paragraph: Chromosome, gene, locus and alleles are all related. What is the different between a gene and a locus? Between a gene and an allele? Chromosomes are composed of genes located at specific loci. And genes have different alleles. If genes did not have different alleles, we would genetically be all the same. What does that mean?. Q: We would genetically be all the same if genes did not have different what? Choices: - atoms - antigens - bases - alleles A:
Answer: alleles
*Question*
Answer the following question given this paragraph: Nucleic acids are large polymers formed by linking nucleotides together and are found in every cell. Deoxyribonucleic acid (DNA) is the nucleic acid that stores genetic information. If all the DNA in a typical mammalian cell were stretched out end to end, it would extend more than 2 m. Ribonucleic acid (RNA) is the nucleic acid responsible for using the genetic information encoded in DNA to produce the thousands of proteins found in living organisms. Q: What nucleic acid stores the genetic information? Choices: - Nucleus - Ribosomes - molecule - dna A:
**Answer**
dna
*Question*
Answer the following question given this paragraph: When compounds are synthesized, they often have contaminating materials mixed in with them. The process of recrystallization can be used to remove these impurities. The crystals are dissolved in a hot solvent, forming a solution. When the solvent is cooled the compound is no longer as soluble and will precipitate out of solution, leaving other materials still dissolved. Q: Recrystallization is a process that can remove what, which result when compounds are synthesized? Choices: - chemicals - substances - minerals - contaminants A:
**Answer**
contaminants