Q: Answer the following question given this paragraph: Scientists don't know for certain why magnetic reversals occur, but there is hard evidence that they have for hundreds of millions of years. The evidence comes from rocks on the ocean floor. Look at Figure below . They show the same ridge on the ocean floor during different periods of time. Q: Where does evidence that magnetic reversals occur come from? A:

OPTIONS:
- snow
- Volcanoes
- air
- rocks on ocean floor

A: rocks on ocean floor

input: OPTIONS:
- tympanic membrane
- hammer and anvil
- cornea
- cochlea Now, answer this question: Answer the following question given this paragraph: Hearing losses can occur because of problems in the middle or inner ear. Conductive losses in the middle ear can be partially overcome by sending sound vibrations to the cochlea through the skull. Hearing aids for this purpose usually press against the bone behind the ear, rather than simply amplifying the sound sent into the ear canal as many hearing aids do. Damage to the nerves in the cochlea is not repairable, but amplification can partially compensate. There is a risk that amplification will produce further damage. Another common failure in the cochlea is damage or loss of the cilia but with nerves remaining functional. Cochlear implants that stimulate the nerves directly are now available and widely accepted. Over 100,000 implants are in use, in about equal numbers of adults and children. The cochlear implant was pioneered in Melbourne, Australia, by Graeme Clark in the 1970s for his deaf father. The implant consists of three external components and two internal components. The external components are a microphone for picking up sound and converting it into an electrical signal, a speech processor to select certain frequencies and a transmitter to transfer the signal to the internal components through electromagnetic induction. The internal components consist of a receiver/transmitter secured in the bone beneath the skin, which converts the signals into electric impulses and sends them through an internal cable. Q: Conductive losses in the middle ear can be partially overcome by sending sound vibrations to what structure through the skull, the principle behind implants for hearing loss patients? A:
A:
output: cochlea

Answer the following question given this paragraph: Minerals form from dissolved substances when water evaporates. Q: What process does water undergo to leave behind dissolved substances? A:

OPTIONS:
- accumulation
- oxidation
- ascension
- evaporation

Answer: evaporation

Problem: OPTIONS:
- immersion
- saturation
- combustion
- dispersion
Q: Answer the following question given this paragraph: We see about six colors in a rainbowred, orange, yellow, green, blue, and violet; sometimes indigo is listed, too. Those colors are associated with different wavelengths of light, as shown in Figure 25.22. When our eye receives pure-wavelength light, we tend to see only one of the six colors, depending on wavelength. The thousands of other hues we can sense in other situations are our eye's response to various mixtures of wavelengths. White light, in particular, is a fairly uniform mixture of all visible wavelengths. Sunlight, considered to be white, actually appears to be a bit yellow because of its mixture of wavelengths, but it does contain all visible wavelengths. The sequence of colors in rainbows is the same sequence as the colors plotted versus wavelength in Figure 25.22. What this implies is that white light is spread out according to wavelength in a rainbow. Dispersion is defined as the spreading of white light into its full spectrum of wavelengths. More technically, dispersion occurs whenever there is a process that changes the direction of light in a manner that depends on wavelength. Dispersion, as a general phenomenon, can occur for any type of wave and always involves wavelength-dependent processes. Dispersion Dispersion is defined to be the spreading of white light into its full spectrum of wavelengths. Q: What is defined as the spreading of white light into its full spectrum of wavelengths? A:
Answer: dispersion

Problem:OPTIONS:
- variable
- important
- life saving
- insignificant

Answer the following question given this paragraph: Q: What type of role does cartilage play in the human skeleton? A:
****
A: insignificant

Problem:OPTIONS:
- same selection
- artificial selection
- characteristic selection
- natural selection

Answer the following question given this paragraph: 19.2 Population Genetics Both genetic and environmental factors can cause phenotypic variation in a population. Different alleles can confer different phenotypes, and different environments can also cause individuals to look or act differently. Only those differences encoded in an individual's genes, however, can be passed to its offspring and, thus, be a target of natural selection. Natural selection works by selecting for alleles that confer beneficial traits or behaviors, while selecting against those for deleterious qualities. Genetic drift stems from the chance occurrence that some individuals in the germ line have more offspring than others. When individuals leave or join the population, allele frequencies can change as a result of gene flow. Mutations to an individual's DNA may introduce new variation into a population. Allele frequencies can also be altered when individuals do not randomly mate with others in the group. Q: What works by selecting for alleles that confer beneficial traits or behaviors, while selecting against those for deleterious qualities? A:
****
A:
natural selection