Question

directions: read the \science news\ section on pages 2 - 7. then test your knowledge, filling in the letters next to the correct answers. every fall, salmon swim upstream to spawn. what does spawn mean? a to lay eggs b to hide from predators c to search for food d to group together which statement about the klamath river dam removal project is true? a between 2022 and 2024, four dams were fully removed from the river. b it is the largest dam removal project in u.s. history. c conservation groups and local indigenous tribes fought for the removal of dams along the klamath river for decades. d all of the above why do scientists think the exoplanet k2 - 18b might be home to alien life? a its located about 730 trillion miles from earth. b its atmosphere appears to contain high levels of dimethyl sulfide. c the james webb space telescope captured images of plankton in its oceans. d all of the above when used heavily, acetaminophen can damage which part of the body? a eyes b brain c lungs d liver why does the company colossal biosciences claim to have revived extinct dire wolves? a it discovered a small population of dire wolves in the arctic. b it bred gray wolf pups whose dna was edited to have some dire wolf traits. c it re - created the entire dire wolf genome. d it released a pack of dire wolves into the wild. what part of the cell contains dna? a cell membrane b mitochondria c nucleus d vacuole how is a torpedo bat different from a standard baseball bat? a a torpedo bat is 42 inches long, while a standard bat is 44 inches long. b a torpedo bats mass is concentrated in the middle of its barrel, while a standard bats mass is evenly distributed. c a torpedo bat is hollow, while a standard bat is solid all the way through. d a torpedo bat is illegal in major league baseball, while a standard bat is permitted. which of the following statements about red dye no. 3 is true? a its only found in candy. b its been proven that low doses cause liver cancer in humans. c the u.s. food and drug administration approved its use in january 2025. d its synthetic, or lab - made. about how many more products contain red dye no. 40 than red dye no. 3? a 20,000 b 30,000 c 40,000 d 50,000 johannes gutenberg invented the movable - type printing press ______ years ago. a 178 b 585 c 900 d 1,157

Explanation:

1. Spawning in salmon refers to laying eggs, a biological reproductive process.
2. DNA is primarily located in the nucleus of a cell.
3. The Klamath River dam - removal was a major project with multiple aspects like being the largest in U.S. history and having long - term support from conservation groups and tribes.
4. Scientists think K2 - 18b might have life due to its atmospheric composition, specifically high levels of dimethyl sulfide.
5. Heavy use of acetaminophen can damage the liver.
6. Colossal Biosciences claims to have revived dire wolves by breeding gray wolf pups with edited DNA to have dire wolf traits.
7. A torpedo bat is illegal in Major League Baseball while a standard bat is permitted.
8. Red Dye No. 3 is synthetic.
9. There is no information provided to accurately answer the question about the number of products containing Red Dye No. 40 vs Red Dye No. 3.
10. Johannes Gutenberg invented the movable - type printing press around 585 years ago (in the 15th century).

Answer:

1. A. to lay eggs
2. C. nucleus
3. D. all of the above
4. B. Its atmosphere appears to contain high levels of dimethyl sulfide.
5. D. liver
6. B. It bred gray wolf pups whose DNA was edited to have some dire wolf traits.
7. D. A torpedo bat is illegal in Major League Baseball, while a standard bat is permitted.
8. D. It's synthetic, or lab - made.
9. No valid answer based on given info
10. B. 585