Cells could sense and respond to electromagnet signals such as light and mechanical signals such as touch. Cells often communicate with each other using chemical signals.
The answer should be option B "Enzymes bond with one or more reactants and lower the activation energy needed for the reaction." Enzymes role is to reduce the amount of activation energy it needs in order for it to have the reaction. Enzymes are known to be the ones to speed up a biochemical reaction.
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If the prey population is thriving, then the predator population will as well- or at least, until they eat out that population, then the prey and the predators will be at a decline. It's a balance.
Answer:
This phenomenon might increase sperm production in males
Explanation:
The most common androgen is testosterone, a hormone produced in the animal male gonads.
In the male gonads, testosterone binds to androgen receptors to activate transcription of genes involved in spermatogenesis
Answer:
Stem cells are cells in the human body that have the ability to develop into many other body cell types. Stem cells are very useful for drug development, research, they aren't likely to be rejected in transplants, and are used to repair damaged or diseased cells and tissues. However, they cannot be grown for long periods of time, there are very small numbers in each tissue and cell making them very hard to find, and for certain studies they have been shown to cause cancer. To be honest, using them in research does have its pros and cons, they are very useful and easier to use in research, plus they can help repair damaged and diseased cell tissues. But at the same time they can be difficult to use correctly and properly, it can cause serious health problems if cancer doesn't take place. I think that using them in research is okay, as long as they are used correctly and properly.
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