*Question*
Answer the following question given this paragraph: Parasitic roundworms may have plant, vertebrate, or invertebrate hosts. Several species have human hosts. For example, hookworms, like the one in Figure below , are human parasites. They infect the human intestine. They are named for the hooks they use to grab onto the host's tissues. Hookworm larvae enter the host through the skin. They migrate to the intestine, where they mature into adults. Adults lay eggs, which pass out of the host in feces. Then the cycle repeats. Q: Through which organ do hookworm larvae enter the human body? Choices: - through the lungs - through the rectum - through the mouth - through the skin A:
**Answer**
through the skin

*Question*
Answer the following question given this paragraph: Of the 23 pairs of human chromosomes, 22 pairs are autosomes (numbers 122 in Figure above ). Autosomes are chromosomes that contain genes for characteristics that are unrelated to sex. These chromosomes are the same in males and females. The great majority of human genes are located on autosomes. At the link below, you can click on any human chromosome to see which traits its genes control. http://www. ornl. gov/sci/techresources/Human_Genome/posters/chromosome/chooser. shtml. Q: Which blood vessels is oxygen transferred through? Choices: - cilia - arteries - veins - capillaries A:
**Answer**
capillaries

*Question*
Answer the following question given this paragraph: Electromagnetic radiation behaves like particles as well as waves. This prompted Albert Einstein to develop his wave-particle theory. Q: Electromagnetic radiation behaves like particles as well as what? Choices: - fluids - currents - points - waves A:
**Answer**
waves

*Question*
Answer the following question given this paragraph: Evolution is a change in the characteristics of living things over time. As described by Darwin, evolution occurs by a process called natural selection . In natural selection, some members of a species, being better adapted or suited to their environment, produce more offspring than others, so they pass "advantageous traits" to their offspring. Over many generations, this can lead to major changes in the characteristics of the species. Evolution explains how living things are changing today and how modern living things have descended from ancient life forms that no longer exist on Earth. As living things evolve, they generally become better suited for their environment. This is because they evolve adaptations. An adaptation is a trait that helps an organism survive and reproduce in a given environment. Q: Evolution occurs by what process whereby better-adapted members pass along their traits, according to darwin? Choices: - organic selection - natural change - spontaneous variation - natural selection A:
**Answer**
natural selection