Q: What is essential for forming new genes? Read this paragraph and choose the correct option from the provided answers: 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. Choices: - enough mutations - enough chromosomes - chromosome deversity - large mutations A:
large mutations

Q: Neutron stars are the corpses of left over what? Read this paragraph and choose the correct option from the provided answers: Neutron stars are the corpses of stars left over after supernova explosions. They are the size of a small city, but can spin several times per second. (Try to imagine this in your head. ) Consider a neutron star of radius 10 km that spins with a period of 0.8 seconds. Imagine a person is standing at the equator of this neutron star. Calculate the centripetal acceleration of this person and compare it to the acceleration due to gravity on Earth. Choices: - planet explosions - gravitational explosions - stellar explosions - supernova explosions A:
supernova explosions

Q: What do you call materials that have high resistance to electric current? Read this paragraph and choose the correct option from the provided answers: Materials that have high resistance to electric current are called electric insulators . Examples include most nonmetallic solids, such as wood, rubber, and plastic. Their atoms hold onto their electrons tightly, so electric current cannot flow freely through them. Dry air is also an electric insulator. You can learn more about electric insulatorsas well as how to test whether a material is an insulatorby doing the activity at this URL:. Choices: - conductors - semiconductors - destructive insulators - electric insulators A:
electric insulators

Q: Organisms that obtain food from outside themselves (i.e. they don't make their own food) are known as what? Read this paragraph and choose the correct option from the provided answers: Fungi are heterotrophs, meaning they obtain food from outside themselves. Choices: - autotrophs - zygotes - fungi - heterotrophs A:
heterotrophs