Answer the following question given this paragraph: Smog clouds the city of Los Angeles, California. Visible air pollution in the form of smog is a sign that the air is unhealthy. Q: Smog is a visible form of what? Choices: - condensation - water pollution - oxidation - air pollution A:
air pollution
(Question)
Answer the following question given this paragraph: The replacing of the electron enables chlorophyll to respond to another photon. The oxygen molecules produced as byproducts find their way to the surrounding environment. The hydrogen ions play critical roles in the remainder of the light-dependent reactions. Keep in mind that the purpose of the light-dependent reactions is to convert solar energy into chemical carriers that will be used in the Calvin cycle. In eukaryotes and some prokaryotes, two photosystems exist. The first is called photosystem II, which was named for the order of its discovery rather than for the order of the function. After the photon hits, photosystem II transfers the free electron to the first in a series of proteins inside the thylakoid membrane called the electron transport chain. As the electron passes along these proteins, energy from the electron fuels membrane pumps that actively move hydrogen ions against their concentration gradient from the stroma into the thylakoid space. This is quite analogous to the process that occurs in the mitochondrion in which an electron transport chain pumps hydrogen ions from the mitochondrial stroma across the inner membrane and into the intermembrane space, creating an electrochemical gradient. After the energy is used, the electron is accepted by a pigment molecule in the next photosystem, which is called photosystem I (Figure 5.13). Q: What type of ions play critical roles in light-dependent reactions? Choices: - calcium - silicon - helium - hydrogen A:
(Answer)
hydrogen
Ques: Answer the following question given this paragraph: The molecular mass is the sum of the masses of the atoms in a molecule. Q: What is the sum of the massess of the atoms in a molecule? Choices: - underlying mass - magnetic mass - nuclear mass - molecular mass A:
Ans: molecular mass
(Q).
Answer the following question given this paragraph: Cerebral Cortex Compared to other vertebrates, mammals have exceptionally large brains for their body size. An entire alligator's brain, for example, would fill about one and a half teaspoons. This increase in brain to body size ratio is especially pronounced in apes, whales, and dolphins. While this increase in overall brain size doubtlessly played a role in the evolution of complex behaviors unique to mammals, it does not tell the whole story. Scientists have found a relationship between the relatively high surface area of the cortex and the intelligence and complex social behaviors exhibited by some mammals. This increased surface area is due, in part, to increased folding of the cortical sheet (more sulci and gyri). For example, a rat cortex is very smooth with very few sulci and gyri. Cat and sheep cortices have more sulci and gyri. Chimps, humans, and dolphins have even more. Q: What organ do mammals have that is exceptionally large for their body size? Choices: - lungs - heart - liver - brain A:
(A).
brain
Ques:Answer the following question given this paragraph: Increasing or decreasing the temperature of a system at equilibrium is also a stress to the system. The equation for the Haber-Bosch process is written again below, as a thermochemical equation. Q: What effect does changing temperature have on a system at equilibrium? Choices: - movement - the height - energy - stress A:

Ans:stress
Answer the following question given this paragraph: Genetics is the branch of biology that focuses on heredity. The basics of heredity are similar for all organisms that reproduce sexually: the offspring receive one set of genetic material from one parent and the other set from the other parent. But are there aspects of genetics that are specific for humans? Let's find out. Q: What branch of biology focuses on heredity? Choices: - Epidemiology - ontology - semiotics - genetics A:
genetics