(Question)
Answer the following question given this paragraph: The target cell then needs to be able to recognize the signal. Chemical signals are received by the target cell on receptor proteins. Most receptor proteins are found associated with the plasma membrane, but some are also found inside the cell. Receptor proteins are very specific for only one particular signal molecule, much like a lock that recognizes only one key. Therefore, a cell has lots of receptor proteins to recognize the large number of cell signal molecules. There are three stages to sending and receiving a cell "message:" reception, transduction, and response. Q: Chemical signals are received by the target cell on what? Choices: - acidic proteins - inceptor proteins - parent proteins - receptor proteins A:
(Answer)
receptor proteins

(Question)
Answer the following question given this paragraph: All ecosystems need a constant input of energy in the form of sunlight or chemical compounds. Living things can be classified based on how they obtain energy as producers, consumers, or decomposers. Q: The energy for an ecosystem can come from sunlight or _________? Choices: - radiation compounds - fossil fuels - rain - chemical compounds A:
(Answer)
chemical compounds

(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