Answer the following question given this paragraph: The carbonyl group, a carbon-to-oxygen double bond, is the defining feature ofaldehydes and ketones. In aldehydes at least one bond on the carbonyl group is a carbon-to-hydrogen bond; in ketones, both available bonds on the carbonyl carbon atom are carbon-to-carbon bonds. Aldehydes are synthesized by the oxidation of primary alcohols. The aldehyde can be further oxidized to a carboxylic acid. Ketones are prepared by the oxidation of secondary alcohols. Mild oxidizing agents oxidize aldehydes to carboxylic acids. Ketones are not oxidized by these reagents. A thiol is a compound with an SH functional group. Q: What are prepared by the oxidation of secondary alcohols? Choices: - protons - more alcohol - ions - ketones A:
ketones
Answer the following question given this paragraph: 29.5 Birds Birds are endothermic, meaning they produce their own body heat and regulate their internal temperature independently of the external temperature. Feathers not only act as insulation but also allow for flight, providing lift with secondary feathers and thrust with primary feathers. Pneumatic bones are bones that are hollow rather than filled with tissue, containing air spaces that are sometimes connected to air sacs. Airflow through bird lungs travels in one direction, creating a crosscurrent exchange with the blood. Birds are diapsids and belong to a group called the archosaurs. Birds are thought to have evolved from theropod dinosaurs. The oldest known fossil of a bird is that of Archaeopteryx, which is from the Jurassic period. Modern birds are now classified into two groups, Paleognathae and Neognathae. Q: What is the technical term for species that produce their own body heat and regulate their internal temperature independently of the outside temperature? Choices: - hydrostatic - Phototrophic - osmotic - endothermic A:
endothermic
Q: Answer the following question given this paragraph: Concentration Effects Two substances cannot possibly react with each other unless their constituent particles (molecules, atoms, or ions) come into contact. If there is no contact, the reaction rate will be zero. Conversely, the more reactant particles that collide per unit time, the more often a reaction between them can occur. Consequently, the reaction rate usually increases as the concentration of the reactants increases. One example of this effect is the reaction of sucrose (table sugar) with sulfuric acid, which is shown in Figure 14.1 "The Effect of Concentration on Reaction Rates". Q: The reaction rate usually increases as the concentration of what increases? Choices: - generators - mutations - complexes - reactants A:
A: reactants
Question: Answer the following question given this paragraph: In unsaturated fatty acids, there is at least one double bond between carbon atoms. As a result, some carbons are not bonded to as many hydrogen atoms as possible. Unsaturated fatty acids are found in oils. Oils are liquid lipids that plants use to store energy. Q: Oils are liquid lipids that plants use for storage of what? Choices: - fat - glucose - oxygen - energy A:
Answer: energy
*Question*
Answer the following question given this paragraph: Different types of plant cells include parenchymal, collenchymal, and sclerenchymal cells. The three types differ in structure and function. Q: Parenchymal, collenchymal, and sclerenchymal cells are associated with what types of living things? Choices: - primates - parasites - fungi - plants A:
**Answer**
plants
(Q).
Answer the following question given this paragraph: Many crops are grown where there isn't enough rainfall for plants to thrive. For example, crops are grown in deserts of the American southwest. How is this possible? The answer is irrigation. Irrigation is any way of providing extra water to plants. Most of the water used in agriculture is used for irrigation. Livestock also use water, but they use much less. Q: What is most of the water used in agriculture used for? Choices: - cleaning - construction - sowing - irrigation A:
(A).
irrigation