Answer the following question given this paragraph: Q: What can exposure to chemical or biological agents cause later in life? Choices: - adaptation - spontaneous mutation - regression - an acquired immunodeficiency A:
an acquired immunodeficiency
Answer the following question given this paragraph: Freshwater below Earth's surface is called groundwater . The water infiltrates, or seeps down into, the ground from the surface. How does this happen? And where does the water go?. Q: What is freshwater below the earth's surface called? Choices: - geyser - sediment - precipitation - groundwater A:
groundwater
Q: Answer the following question given this paragraph: Q: Some 96% of the dry mass consists of organic compounds produced by what? Choices: - erosion - electrolysis - reproduction - photosynthesis A:
A: photosynthesis
Question: Answer the following question given this paragraph: Molecules in the cell membrane allow it to be semipermeable. The membrane is made of a double layer of phospholipids (a "bilayer") and proteins ( Figure below ). Recall that phospholipids, being lipids, do not mix with water. It is this quality that allows them to form the outside barrier of the cell. Q: Phospholipids are unable to mix with what? Choices: - nitrogen - solids - air - water A:
Answer: water
*Question*
Answer the following question given this paragraph: The retina is a membrane lining the back of the eye. The retina has nerve cells called rods and cones that change images to electrical signals. Rods are good at sensing dim light but can't distinguish different colors of light. Cones can sense colors but not dim light. There are three different types of cones. Each type senses one of the three primary colors of light (red, green, or blue). Q: What do you call the membrane lining the back of the eye? Choices: - cornea - stimulation - aperture - retina A:
**Answer**
retina
Q: Answer the following question given this paragraph: The smallest and lightest alcohols (methanol, ethanol, propanol) are completely soluble in water in all proportions. In a solution, the hydroxyl groups of alcohol molecules and the water molecules form hydrogen bonds with each other, resulting in complete miscibility. However, as the length of the carbon chain increases, the solubility decreases. The solubility of 1-butanol is 7.4 g per 100 g of water, while that of 1-pentanol is 2.7 g per 100 g water, and 1-octanol is 0.06 g per 100 g water. The carbon chain portion of the larger alcohol molecule is nonpolar and leads to the decreased solubility of the overall compound. Q: The smallest and lightest alcohols (methanol, ethanol, propanol) are completely soluble in? Choices: - gasoline - oil - argon - water A:
A: water