Answer the following question given this paragraph: Isotopes with magic numbers of protons and/or neutrons tend to be especially stable. Elements with magic numbers of protons tend to have more stable isotopes than elements that do not. Q: Elements with magic numbers of what tend to have more stable isotopes? Choices: - nucleus - pressure - molecules - protons A:
protons
Answer the following question given this paragraph: Hearing is the ability to sense sound waves, and the ear is the organ that senses sound. Sound waves enter the auditory canal and travel to the eardrum (see Figure below ). They strike the eardrum and make it vibrate. The vibrations then travel through several other structures inside the ear and reach the cochlea. The cochlea is a coiled tube filled with liquid. The liquid moves in response to the vibrations, causing tiny hair cells lining the cochlea to bend. In response, the hair cells send nerve impulses to the auditory nerve , which carries the impulses to the brain. The brain interprets the impulses and "tells" us what we are hearing. Q: What is the organ that senses sound? Choices: - nose - eye - skin - ear A:
ear
Q: Answer the following question given this paragraph: In the liquid state, the hydrogen bonds of water can break and reform as the molecules flow from one place to another. When water is cooled, the molecules begin to slow down. Eventually, when water is frozen to ice, the hydrogen bonds become permanent and form a very specific network (see Figure below ). Q: As the temperature of water decreases what happens to the speed of the water molecules? Choices: - move faster - evaporate - begin to boil - slow down A:
A: slow down
Question: Answer the following question given this paragraph: Plants have evolved three pathways for carbon fixation. The most common pathway combines one molecule of CO 2 with a 5-carbon sugar called ribulose biphosphate (RuBP). The enzyme which catalyzes this reaction, ribulose-1,5-bisphosphate carboxylase oxygenase (nicknamed RuBisCo ), is the most abundant enzyme on earth! The resulting 6-carbon molecule is unstable, so it immediately splits into two much more stable 3-carbon phosphoglycerate molecules. The 3 carbons in the first stable molecule of this pathway give this largest group of plants the name "C-3. ". Q: How many pathways do plants have for carbon fixation? Choices: - one - four - two - three A:
Answer: three
*Question*
Answer the following question given this paragraph: transient males. Since these loyal males already bond and cooperate with females, it may well be a simple matter for them to bond and cooperate with each other. In a semi-counter intuitive manner, the ability to bond with males could be selected for based on its effect on reproductive success with females. On the other hand, a male that commits himself to a cooperative (loyal and exclusive) arrangement with a female necessarily limits his interactions One of the most robust and reliable findings in with other females. This implies that he will attempt to insure the scientific literature on interpersonal that the offspring he is raising are genetically related to him. attraction is the overwhelming role played by physical attractiveness in defining the ideal Of course, another possibility is that a loyal male may be romantic partner (Hatfield & Sprecher, 1986; attractive to multiple females, who in turn compete for his Jackson, 1992). Both men and women express attention and loyalty. Clearly the outcome of such interactions marked preference for an attractive partner in a is influenced by how many females can the male effectively non- committed short-term (casual, one night stand) relationship (Buss & Schmitt, 1993). protect (that is, improve their reproductive success). The situation quickly gets complex and many competing strategies are possible. Different species make different choices depending upon their evolutionary history and environmental constraints. As we noted above, secondary sexual characteristics, that is, traits that vary dramatically between the two sexes, serve to advertise various traits, including heath, loyalty, robustness, and fertility. The size and symmetry of a beetle's or an elk's antlers or a grasshopper's song communicate rather clearly their state of health.192 The tail of the male peacock is a common example, a male either has large, colorful and symmetrical tail, all signs of a health or it does not there is little room for ambiguity. These predictions have been confirmed... Q: The size and symmetry of a beetle's or an elk's antlers or a grasshopper's song communicate rather clearly their state of what? Choices: - society - problem - need - health A:
**Answer**
health
(Q).
Answer the following question given this paragraph: Chemists want to be able to predict the outcome of reactions. They would like it to be possible to predict what will happen when reactants are added together under a given set of conditions. The conditions of a reaction might include things like temperature, pressure, and concentrations of various reaction components. If the given conditions favor the formation of products, the reaction is said to be spontaneous . Q: How is a reaction described when the given conditions favor formation of products? Choices: - instantaneous - fluctuations - planned - spontaneous A:
(A).
spontaneous