Q: Receptors for what chemical messengers recognize molecules with specific shapes and side groups, and respond only to those that are recognized? Read this paragraph and choose the correct option from the provided answers: Pathways of Hormone Action The message a hormone sends is received by a hormone receptor, a protein located either inside the cell or within the cell membrane. The receptor will process the message by initiating other signaling events or cellular mechanisms that result in the target cell's response. Hormone receptors recognize molecules with specific shapes and side groups, and respond only to those hormones that are recognized. The same type of receptor may be located on cells in different body tissues, and trigger somewhat different responses. Thus, the response triggered by a hormone depends not only on the hormone, but also on the target cell. Once the target cell receives the hormone signal, it can respond in a variety of ways. The response may include the stimulation of protein synthesis, activation or deactivation of enzymes, alteration in the permeability of the cell membrane, altered rates of mitosis and cell growth, and stimulation of the secretion of products. Moreover, a single hormone may be capable of inducing different responses in a given cell. Choices: - acids - chromosomes - enzymes - hormones A:
hormones

Q: How many major forces of elevation cause allele frequencies to change? Read this paragraph and choose the correct option from the provided answers: There are four major forces of evolution that cause allele frequencies to change. They are mutation, gene flow, genetic drift, and natural selection. Choices: - one - five - three - four A:
four

Q: Q: The biological electron transport chain provides for an orderly, stepwise transfer of electrons. both nadh (reduced nicotinamide adenine dinucleotide) and fadh2 (reduced flavin adenine dinucleotide) are energy rich molecules that liberate a large amount of energy during what? Read this paragraph and choose the correct option from the provided answers: The biological electron transport chain provides for an orderly, stepwise transfer of electrons. Both NADH (reduced nicotinamide adenine dinucleotide) and FADH2 (reduced flavin adenine dinucleotide) are energyrich molecules that liberate a large amount of energy during oxidation. Free energy released during the transfer of electrons from either of these molecules to oxygen drives the synthesis of ATP (adenosine triphosphate) formed during respiratory metabolism. The reactions are as follows:. Choices: - extrapolation - conduction - evaporation - oxidation A:
A: oxidation

Question: Q: What two forces tend to keep an animal stationary and thus oppose locomotion? Read this paragraph and choose the correct option from the provided answers: Choices: - workload and gravity - thickness and gravity - stength and gravity - friction and gravity A:
Answer: friction and gravity

*Question*
Q: Why does water infiltrate the ground? Read this paragraph and choose the correct option from the provided answers: Water infiltrates the ground because soil and rock are porous. Between the grains are pores, or tiny holes. Since water can move through this rock it is permeable. Eventually, the water reaches a layer of rock that is not porous and so is impermeable. Water stops moving downward when it reaches this layer of rock. Choices: - gravity - prolonged drought conditions - run-off from flooding - because soil and rocks are porous A:
**Answer**
because soil and rocks are porous

Q: Q: When fuel is burned most of the energy is released as what? Read this paragraph and choose the correct option from the provided answers: When fuel is burned, most of the energy is released as heat . Some of this heat can be used to do work. Heat cooks food or warms your house. Sometimes the heat is just waste heat. It still heats the environment, though. Choices: - humidity - condensation - precipitation - heat A:
A: heat