Answer the following question given this paragraph: Symbiosis is a close relationship between two species in which at least one species benefits. For the other species, the relationship may be beneficial, harmful, or neutral. There are three types of symbiosis: mutualism, parasitism, and commensalism. Q: What are the three types of symbiosis? Choices: - connectionism , parasitism , commensalism - commensalism, osmosis, internalization - internalization , parasitism , commensalism - mutualism, parasitism, commensalism A:
mutualism, parasitism, commensalism
Answer the following question given this paragraph: Human Genome, Chromosomes, and Genes. Each chromosome of the human genome contains many genes as well as noncoding intergenic (between genes) regions. Each pair of chromosomes is shown here in a different color. Notice that there are 23 pairs of chromosomes. Q: How many pairs of chromosomes do human have ? Choices: - 12 pairs - 31 pairs - 19 pairs - 23 pairs A:
23 pairs
Q: Answer the following question given this paragraph: Four interactions stabilize the tertiary structure of a protein: (a) ionic bonding, (b) hydrogen bonding, (c) disulfide linkages, and (d) dispersion forces. When a protein contains more than one polypeptide chain, each chain is called asubunit. The arrangement of multiple subunits represents a fourth level of structure, the quaternary structure of a protein. Hemoglobin, with four polypeptide chains or subunits, is the most frequently cited example of a protein having quaternary structure Saylor URL: http://www. saylor. org/books. Q: Hemoglobin, with four polypeptide chains or subunits, is the most frequently cited example of a protein having what kind of structure? Choices: - binary - unary - ternary - quaternary A:
A: quaternary
Question: Answer the following question given this paragraph: Q: Living things that feed on others are generally known as what? Choices: - customers - isolators - producers - consumers A:
Answer: consumers
*Question*
Answer the following question given this paragraph: The nitrogen atom of a primary amine is bonded to two hydrogen atoms and one carbon. The nitrogen atom of a secondary amine is bonded to one hydrogen and two carbons. The nitrogen atom of a tertiary amine is bonded to three carbon atoms. Amines are typically named by a common system rather than by IUPAC guidelines. The common system for naming amines along with several examples is shown below. Q: How many hydrogen atoms does a nitrogen atom of a primary amine have? Choices: - four - six - ten - two A:
**Answer**
two
Answer the following question given this paragraph: Boron forms multicenter bonds rather than metallic lattices with delocalized valence electrons. Why does it prefer this type of bonding? Does this explain why boron behaves like a semiconductor rather than a metal? Explain your answer. Q: What kind of bonds does boron form rather than metallic lattices? Choices: - magnetic bonds - electron bonds - bilateral - multicenter A:
multicenter