Answer the following question given this paragraph: A photon isn't a fixed amount of energy. Instead, the amount of energy in a photon depends on the frequency of the electromagnetic wave. The frequency of a wave is the number of waves that pass a fixed point in a given amount of time, such as the number of waves per second. In waves with higher frequencies, photons have more energy. Q: The number of waves that pass a fixed point in a given amount of time is called what? Choices: - wavelength of a wave - spectroscopy of a wave - spread of a wave - frequency of a wave A:
frequency of a wave
Answer the following question given this paragraph: A chemical reaction is a process that changes some chemical substances into other chemical substances. The substances that start a chemical reaction are called reactants . The substances that form as a result of a chemical reaction are called products . During the reaction, the reactants are used up to create the products. For example, when methane burns in oxygen, it releases carbon dioxide and water. In this reaction, the reactants are methane (CH 4 ) and oxygen (O 2 ), and the products are carbon dioxide (CO 2 ) and water (H 2 O). Q: What is a process that changes some chemical substances into other chemical substances? Choices: - a bio reaction - spontaneous mutation - cellular respiration - a chemical reaction A:
a chemical reaction
Q: Answer the following question given this paragraph: Caecilians are most closely related to salamanders. As you can see from Figure below , they have a long, worm-like body without legs. Caecilians evolved from a tetrapod ancestor, but they lost their legs during the course of their evolution. Q: What ancestors did caecillians evolve from? Choices: - ornithopod - arthropod - hominid - tetrapod A:
A: tetrapod
Question: Answer the following question given this paragraph: Symbiosis is a close relationship between two species in which at least one species benefits. Mutualism is a symbiotic relationship in which both species benefit. Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected. Parasitism is a symbiotic relationship in which one species (the parasite) benefits while the other species (the host) is harmed. Q: What type of interspecies relationship involves one party being actively harmed? Choices: - mosaicism - symbiosis - mutualism - parasitism A:
Answer: parasitism
*Question*
Answer the following question given this paragraph: Rainfall in an area is important because it influences the rate of weathering. More rain means that more rainwater passes through the soil. The rainwater reacts chemically with the particles. The top layers of soil are in contact with the freshest water, so reactions are greatest there. High rainfall increases the amount of rock that experiences chemical reactions. High rainfall may also carry material away. This means that new surfaces are exposed. This increases the rate of weathering. Q: What weather phenomenon increases the rate of weathering in rock and soil? Choices: - temperature - earthquake - landslide - rainfall A:
**Answer**
rainfall
(Question)
Answer the following question given this paragraph: The process by which an organism develops from a single-celled zygote to a multi-cellular organism is complex and well regulated. The regulation occurs through signaling between cells and tissues and responses in the form of differential gene expression. Q: The process by which an organism develops from a single-celled zygote to a multi-cellular organism is complex and well regulated. the regulation occurs through signaling between cells and tissues and responses in the form of what? Choices: - phenotype exchange - spontaneous mutation - dna replication - differential gene expression A:
(Answer)
differential gene expression