Answer the following question given this paragraph: 8.2 Chromatin Chromosomes consist of chromatin11 . This is made up of strings of DNA, which typically measure centimeters in length if stretched out. This DNA is wound around a histone12 core and organized into nucleosome13 s. The chromatin14 must be uncoiled for gene expression15 and replication16 . Chromosome micrograph. Q: Chromosomes consist of what material made up of strings of dna? A:

OPTIONS:
- mitochondria
- gray matter
- rna
- chromatin

Answer: chromatin

Answer the following question given this paragraph: The cardiovascular system transports many substances to and from cells throughout the body. Q: What system transports many substances to and from cells throughout the body? A:

OPTIONS:
- nutritional
- physiological
- circulatory
- cardiovascular

Answer: cardiovascular

Answer the following question given this paragraph: Christopher Auyeung, using bat image by User:Rugby471/Wikimedia Commons. Bats use echolocation to identify the location of objects . CC BY-NC 3.0 (bat image available under public domain). Q: What do bats use to determine the location of objects? A:

OPTIONS:
- infrared light
- UV light
- syncopation
- echolocation

Answer: echolocation

Answer the following question given this paragraph: A: A hot water heater increases the temperature of water in most homes. Many hot water heaters burn a fuel such as natural gas. The burning fuel causes the water to get hot because combustion is an exothermic reaction. Q: In a hot water heater, burning fuel causes the water to get hot because combustion is what type of reaction? A:

OPTIONS:
- endothermic
- geothermal
- biochemical
- exothermic

Answer:
exothermic