Carbon<span> is exchanged, or "cycled" among Earth's oceans, atmosphere, ecosystem, and geosphere. All living organisms are built of </span>carbon<span> compounds. It is the fundamental building block of life and an</span>important<span> component of many chemical processes.</span>
Im guessing it is due to gene shuffling
Answer:
d. dynamic receptor proteins
Explanation:
In the skin there are several receptor cells that can pick up various stimuli such as temperature, pressure and pain. They can be classified into mechanoreceptor, thermoreceptor and pain receptor cells. When we are dealing with mechanical stimuli like pressure, mechanoreceptors respond to stimuli by sending the signal to the brain.
Light touches on the skin are received by nerve endings called Meissner corpuscles and Merkel discs. Already more intense pressures (such as a handshake) are received by receptors called Pacini corpuscles.
Control group
Explanation:
Experiments are usually designed so that the differences between the experiment and control groups can be observed.
- The experimental group is the group that follows the details of the hypothesis where variables are changed to see their causes and effects.
- The control group is the standard by which the experimental group is compared with.
- The variables are being tested for in the experimental group to see how they are changing .
learn more:
Controlled experiment brainly.com/question/1621519
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