*Question*
Answer the following question given this paragraph: It is believed that large mutations form new genes. Mutations that duplicate large sections of DNA are a major source of genetic material for new genes. It is thought that tens to hundreds of genes are duplicated in animal genomes every million years. Most genes belong to larger families of genes of shared ancestry. These gene families have domains within the protein with a particular and independent function. These domains have corresponding conserved regions within their genes. It is through duplication mutations that such gene families formed. Genetic recombination after duplication of different domains forms new combinations of domains with new functions. For example, the human eye uses four genes to make structures that sense light: three for color vision and one for night vision; all four arose from a single ancestral gene. Q: What is essential for forming new genes? Choices: - enough mutations - enough chromosomes - chromosome deversity - large mutations A:
**Answer**
large mutations

*Question*
Answer the following question given this paragraph: Chemists are involved in the design and production of new materials. Some of the materials that chemists have helped discover or develop in recent years include polymers, ceramics, adhesives, coatings, and liquid crystals. Liquid crystals are used in electronic displays, as in watches and calculators. The silicon-based computer chip has revolutionized modern society and chemists have played a key role in their design and continued improvement. The calculator shown below uses both a liquid crystal display and chips inside the device. Q: Polymers, ceramics, adhesives, coatings, and liquid crystals are examples of materials recently discovered or developed by what type of scientists? Choices: - material scientists - engineers - geologists - chemists A:
**Answer**
chemists

*Question*
Answer the following question given this paragraph: We see many objects out in space that emit light. This matter is contained in stars, and the stars are contained in galaxies. Scientists think that stars and galaxies make up only a small part of the matter in the universe. The rest of the matter is called dark matter . Q: Scientists think that stars and galaxies make up only a small part of the matter in the universe. what is the rest of the matter called? Choices: - typical matter - light matter - cold matter - dark matter A:
**Answer**
dark matter

*Question*
Answer the following question given this paragraph: Linked genes are genes that are close together on the same chromosome. Linked genes are inherited together. Q: What are genes that are close together on the same chromosome called? Choices: - mutated genes - infected genes - stored genes - linked genes A:
**Answer**
linked genes