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RoseWind [281]
3 years ago
7

Which of the following is a correct statement about evolution?

Biology
1 answer:
alexandr402 [8]3 years ago
5 0

Answer:

C. Evolution is a change of allele frequency from one generation to the next

Explanation:

Evolution is the gradual change that occurs to living organisms over successive generations. According to Charles Darwin, these changes aid in the adaptation of the species of an organism to their environment. In other words, it makes them better fit.

Charles Darwin further stated that since evolution is dependent on natural selection i.e selection of the best fit by environmental factors, the changes that the organism undergo are genetic. Hence, evolution is a change of allele frequency from one generation to the next.

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Excitatory postsynaptic potentials (EPSPs) produced nearly simultaneously by different synapses on the same postsynaptic neuron
lakkis [162]

Answer: summation

Explanation:

The process which determine if an action potential will be generated or not depends on the combined effects of the signal inputs from multiple sources of  synapse or from the repeated signals from the same synapse.  

If the input signals reach the threshold voltage, action potential will be generated. (all –or –none principle).Therefore, this  process is a determinant of  the likelihood of action potential generation  and it is called summation.

Summation is the ability to integrate multiple PSPs at multiple synapses.it is  the process that determine if an action potential will be generated by combined effects of inhibitory or excitatory  signals.

Based on the pathways and voulme of applied stimuli in the presynaptic neuron;

The signals can be temporal summation ( consecutive  signals  produced from the same  synapse)where action potential of high frequency in the PSN generated action potential in the post synaptic neuron, which summate with one another. Or Spatial where signals inputs are from multiple presynaptic cells.

3 0
3 years ago
4. An organism is exposed to a mutagen, such as X-rays or UV light, what could be the resulting
Musya8 [376]

Answer:

Mutations in that organism, which can possibly lead to cancer (via mutations in the proto-oncogenes or tumor-suppressor genes)

8 0
3 years ago
Why are vitamans esential to your body?
geniusboy [140]
Iron is in your blood 
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6 0
3 years ago
PLEASE HELP ASAP!!<br> Adjust the mass. How does the mass of a pendulum affect its period?
elena-14-01-66 [18.8K]

Answer:

The mass of a pendulum's bob does not affect the period. Newton's second law can be used to explain this phenomenon. In F = m a, force is directly proportional to mass. As mass increases, so does the force on the pendulum, but acceleration remains the same.

Explanation:

8 0
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Soil degradation is primarily attributed to:
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B is the correct answer
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