*Question*
Answer the following question given this paragraph: Scientists think that protists are the oldest eukaryotes. If so, they must have evolved from prokaryotic cells. How did this happen? The endosymbiotic theory provides the most widely-accepted explanation. That's because it is well supported by evidence. Q: What do many scientists think are the oldest eukaryotes? Choices: - prokaryotes - plants - arthropods - protists A:
**Answer**
protists

*Question*
Answer the following question given this paragraph: 10.1 | Cloning and Genetic Engineering By the end of this section, you will be able to: Explain the basic techniques used to manipulate genetic material Explain molecular and reproductive cloning Biotechnology is the use of artificial methods to modify the genetic material of living organisms or cells to produce novel compounds or to perform new functions. Biotechnology has been used for improving livestock and crops since the beginning of agriculture through selective breeding. Since the discovery of the structure of DNA in 1953, and particularly since the development of tools and methods to manipulate DNA in the 1970s, biotechnology has become synonymous with the manipulation of organisms' DNA at the molecular level. The primary applications of this technology are in medicine (for the production of vaccines and antibiotics) and in agriculture (for the genetic modification of crops). Biotechnology also has many industrial applications, such as fermentation, the treatment of oil spills, and the production of biofuels, as well as many household applications such as the use of enzymes in laundry detergent. Q: The primary application of biotechnology is in what field? Choices: - physics - chemistry - psychology - medicine A:
**Answer**
medicine

*Question*
Answer the following question given this paragraph: Diffusion into intestinal cells, where they are combined with proteins to create chylomicrons. Q: Intestinal cells combine with proteins to create what? Choices: - amino acids - chondrocytes - lipoproteins - chylomicrons A:
**Answer**
chylomicrons

*Question*
Answer the following question given this paragraph: Some unexpected traits can appear in animal embryos. For example, human embryos have gill slits just like fish! In fish they develop into gills, but in humans they disappear before birth. The presence of the gill slits suggests that a long time ago humans and fish shared a common ancestor. Q: What does the presence of gill slits suggest about humans and fish? Choices: - Shared History - Common Cells - Same evolutionary chain - common ancestor A:
**Answer**
common ancestor