Answer the following question given this paragraph: In chemical equations, reactants and products are represented by chemical symbols and formulas. Numbers called coefficients are placed in front of the symbols and formulas to show how much of each substance is involved in the reaction. Q: What does the coefficient in front of an element in a formula indicate? Choices: - number of atoms - place on the Periodic Table - time of the reaction - how much is involved in the reaction A:
how much is involved in the reaction
Answer the following question given this paragraph: Figure 31.3 Cellulose, the main structural component of the plant cell wall, makes up over thirty percent of plant matter. It is the most abundant organic compound on earth. Plants are able to make their own cellulose, but need carbon from the soil to do so. Q: Cellulose is the main structural component of what part of the plant cell, and makes up over thirty percent of plant matter? Choices: - flowers - roots - proteins wall - cell wall A:
cell wall
Q: Answer the following question given this paragraph: Weathering and erosion. Water, wind, ice, and even plants and animals all act to wear down rocks. Over time they can break larger rocks into smaller pieces called sediments. Moving water, wind, and glaciers then carry these pieces from one place to another. The sediments are eventually dropped, or deposited , somewhere. The sediments may then be compacted and cemented together. This forms a sedimentary rock. This whole process can take hundreds or thousands of years. Q: What is the term for the small particles that rocks are worn down to by water and wind? Choices: - fragments - pebbles - organisms - sediments A:
A: sediments
Question: Answer the following question given this paragraph: Fish have gills that allow them to "breathe" oxygen in water. Water enters the mouth, passes over the gills, and exits the body through a special opening. Gills absorb oxygen from the water as it passes over them. Q: What do fish have that allow them to "breathe" oxygen in water? Choices: - lungs - layers - pores - gills A:
Answer: gills
*Question*
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:
**Answer**
brain
Q: Answer the following question given this paragraph: Pepsinogen is an inactive form of pepsin; pepsin is the active form of the enzyme. Both enzymes catalyze the hydrolysis of peptide bonds. Chymotrypsin catalyzes the hydrolysis of peptide bonds following aromatic amino acids, while trypsin catalyzes the hydrolysis of peptide bonds following lysine and arginine. Aminopeptidase catalyzes the hydrolysis of amino acids from the N-terminal end of a protein, while carboxypeptidase catalyzes the hydrolysis of amino acids from the Cterminal end of a protein. Q: What catalyzes the hydrolysis of amino acids from the n-terminal end of a protein? Choices: - synthase - testosterone - nucleic acid - aminopeptidase A:
A: aminopeptidase