Answer: E) Certain environments can lead to an increased risk of developing certain diseases.
Explanation: This is the most logical answer since environmental factors, such as pollution, can increase one's risk of developing certain diseases.
A. is incorrect because genetic factors are not the only things that affect individual health. One's environment also factors in. If one lives a healthy lifestyle, they can help prevent themselves from developing disease that are more "encouraged" by their genes. An example would be a genetic trait that increases one's risk for heart disease. One can work to avoid heart disease by utilizing a healthier lifestyle.
B. is wrong because environmental factors play an equal role in determining if one will develop some genetically linked diseases.
C. is incorrect because as it stands, one cannot control their genetic traits.
D. is incorrect because some diseases, such as cystic fibrosis and sickle cell anemia are genetically inherited diseases which cannot be prevented by environmental factors. This is not to say that environmental factors are independent of all genetically linked diseases, but not all diseases can be prevented by environmental factors.
Answer:
The neuron will not fire an action potential.
Explanation:
The missing magnitudes of the synaptic potentials when they reach the postsynaptic cell's axon hillock are:
A. excitatory +7
B. excitatory +10
C. inhibitory -3
D. excitatory +2
E. inhibitory -4
To fire the action potential, the summation of excitatory postsynaptic potentials (EPSP) and inhibitory postsynaptic potentials (IPSP) must reach the action potential threshold, which in this case is 15mV more positive than the resting potential.
The EPSP are: +7 +10 +2= +19
The IPSP are: -3 - 4= -7
EPSP + IPSP=
+19 -7 = +12 mV
The neuron will not fire an action potential since the integration of EPSP and IPSP is below 15mv.
<u> Bacterial growth curve-</u>
The phase in the bacterial growth curve which is defined by zero net growth due to a lack of nutrients and excessive waste products being present is the death phase of the growth curve.
<u>Phases of the bacterial growth curve-</u>
The bacterial growth curve is a curve that depicts the number of viable live cells in a bacterial culture over a span of time. This growth curve has four very distinct phases, which are- lag phase, log phase, stationary phase, death phase.
- Lag phase- The first phase which is the period of metabolic growth rather than division of cells.
- Log phase- The second phase where the cells are dividing and increasing in numbers.
- Stationary phase- The third phase where the bacterial cells reach a stagnant period and stop dividing due to the lack of nutrients.
- Death phase- The last phase where there is no metabolic growth or cellular division. The culture is filled with metabolic wastes from the lysis of cells.
Learn more about the growth curve here-
brainly.com/question/14788016
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Reptiles are ectotherms and cannot raise their body temperature above that of the environment.
