Answer the following question given this paragraph: Q: Amplification that occurs in which cells often requires signal transduction pathways involving second messengers? Choices: - axons - optic nerves - catayst cells - sensory receptor A:
sensory receptor
(Question)
Answer the following question given this paragraph: From left to right across the periodic table, each element has one more proton than the element to its left. Because atoms are always electrically neutral, for each added proton, one electron is also added. Electrons are added first to the lowest energy level possible until that level is full. Only then are electrons added to the next higher energy level. Q: Because atoms are always electrically neutral, for each added proton, one of what is also added? Choices: - ion - quark - neutron - electron A:
(Answer)
electron
Ques: Answer the following question given this paragraph: Recall that terrestrial biomes are defined by their climate. That's because plants and animals are adapted for certain amounts of temperature and moisture. However, would aquatic biomes be classified in the same way? No, that wouldn't make much senseall parts of an aquatic environment have plenty of water. Aquatic biomes can be generally classified based on the amount of salt in the water. Freshwater biomes have less than 1% salt and are typical of ponds and lakes, streams and rivers, and wetlands. Marine biomes have more salt and are characteristic of the oceans, coral reefs, and estuaries. Q: How are aquatic biomes often classified? Choices: - depth - amount of life - amount of light - amount of salt A:
Ans: amount of salt
(Q).
Answer the following question given this paragraph: Waves may be transverse, longitudinal, or a combination of the two. (Water waves are actually a combination of transverse and longitudinal. The simplified water wave illustrated in Figure 16.30 shows no longitudinal motion of the bird. ) The waves on the strings of musical instruments are transverseso are electromagnetic waves, such as visible light. Sound waves in air and water are longitudinal. Their disturbances are periodic variations in pressure that are transmitted in fluids. Fluids do not have appreciable shear strength, and thus the sound waves in them must be longitudinal or compressional. Sound in solids can be both longitudinal and transverse. Q: The waves on the strings of musical instruments are transverseso are electromagnetic waves, such as visible light. sound waves in air and water are this? Choices: - symmetrical - hydroelectric - horizontal - longitudinal A:
(A).
longitudinal
Ques:Answer the following question given this paragraph: Facilitated diffusion is the diffusion of solutes through transport proteins in the plasma membrane. Channel proteins, gated channel proteins, and carrier proteins are three types of transport proteins that are involved in facilitated diffusion. Q: A channel protein is an example of what type of protein? Choices: - component proteins - choice proteins - hemoglobin protein - transport proteins A:

Ans:transport proteins
Answer the following question given this paragraph: Like mitochondria, plastids contain their own DNA. Therefore, according to endosymbiotic theory, plastids may also have evolved from ancient, free-living prokaryotes that invaded larger prokaryotic cells. If so, they allowed early eukaryotes to make food and produce oxygen. Q: Like mitochondria, plastids contain their own what? Choices: - riboflavin - bacteria - molecule - dna A:
dna