Problem: OPTIONS:
- gastrointestinal
- respiratory
- integumentary
- cardiovascular
Q: Answer the following question given this paragraph: The cardiovascular system is the system of organs that delivers blood to all the cells of the body. It's like the body's lifeline. Without the cardiovascular system circulating your blood, you couldn't survive. Q: What system of organs delivers blood to all cells of the body? A:
Answer: cardiovascular

Problem:OPTIONS:
- 6
- 0
- 8
- 7

Answer the following question given this paragraph: dissociated ions. It is a dynamic equilibrium because acid and base molecules are constantly dissociating into ions and reassociating into neutral molecules. The pH scale is a scale used to express the concentration of hydrogen ions in solution. A neutral solution, neither acidic nor basic, has a pH of 7. Acidic solutions have a pH lower than 7, while basic solutions have a pH higher than 7. Buffers are solutions that resist dramatic changes in pH when an acid or a base is added to them. They contain a weak acid and a salt of that weak acid, or a weak base and a salt of that weak base. When a buffer is present, any strong acid reacts with the anion of the salt, forming a weak acid and minimizing the presence of hydrogen ions in solution. Any strong base reacts with the weak acid, minimizing the amount of additional hydroxide ions in solution. However, buffers only have limited capacity; there is a limit to the amount of strong acid or strong base any given amount of buffer will react with. Q: The ph scale is a scale used to express the concentration of hydrogen ions in solution. a neutral solution, neither acidic nor basic, has a ph of what? A:
****
A: 7

Answer the following question given this paragraph: Q: What length of time is human gestation commonly divided into? A:
OPTIONS:
- two halves
- fifty weeks
- four quarters
- three trimesters
three trimesters

Answer the following question given this paragraph: Lipids A lipid is one of a highly diverse group of compounds made up mostly of hydrocarbons. The few oxygen atoms they contain are often at the periphery of the molecule. Their nonpolar hydrocarbons make all lipids hydrophobic. In water, lipids do not form a true solution, but they may form an emulsion, which is the term for a mixture of solutions that do not mix well. Q: A lipid is one of a highly diverse group of compounds made up mostly of what? A:
OPTIONS:
- nucleic acid
- amines
- proteins
- hydrocarbons

Answer: hydrocarbons

Question: Answer the following question given this paragraph: CHAPTER SUMMARY 40.1 Overview of the Circulatory System In most animals, the circulatory system is used to transport blood through the body. Some primitive animals use diffusion for the exchange of water, nutrients, and gases. However, complex organisms use the circulatory system to carry gases, nutrients, and waste through the body. Circulatory systems may be open (mixed with the interstitial fluid) or closed (separated from the interstitial fluid). Closed circulatory systems are a characteristic of vertebrates; however, there are significant differences in the structure of the heart and the circulation of blood between the different vertebrate groups due to adaptions during evolution and associated differences in anatomy. Fish have a two-chambered heart with unidirectional circulation. Amphibians have a three-chambered heart, which has some mixing of the blood, and they have double circulation. Most non-avian reptiles have a three-chambered heart, but have little mixing of the blood; they have double circulation. Mammals and birds have a four-chambered heart with no mixing of the blood and double circulation. Q: In most animals, the circulatory system is used to transport blood through the what? A:
OPTIONS:
- fur
- stratum corneum
- nerves
- body
Answer: body

input: OPTIONS:
- water temperature
- salinity
- species populations
- depth of water Now, answer this question: Answer the following question given this paragraph: Aquatic biomes are determined mainly by depth of water and distance from shore. They include freshwater and marine biomes. Q: Aquatic biomes are determined mainly by distance from shore and what other factor? A:
A:
output:
depth of water