Answer:
Question Answer
Inquiry This is the act of trying to find the answer to an unknown question by the use of experimentation and research.
Investigation This is the process of researching or studying a concept. Examination, inquiry
Explanation:
Answer:
Sensing danger and sweating
Answer:
Answer for the question:
Which of the following statements about the phosphorus cycle is false? The main abiotic reservoir for phosphorus is in the soil. Plants release dissolved phosphate ions into the soil. Guano can be used by farmers to add phosphorus to the soil. Phosphates that drain from soils into the sea becomes part of new rock and will cycle back into living organisms.
is given below.
Explanation:
The correct answer is given below.
Soil is not the main reservoir for the phosphorous. The main antibiotic phosphorous is in the rocks.
Why did the narrator use the phrase “fit together like puzzle pieces” to describe how the cells of a developing human embryo form a human face
Answer:
The membrane potential of a nerve cell will depolarize if there is an increase in the positive ions inside the cell.
Explanation:
When nerves are in resting potential it is -70mV. In this stage interior of the cell is negatively charged and outside is more positive. When depolarization occurs the inside cell becomes positive.
This is due to the rush of sodium ions into the cell by voltage-gated channels. Now the inside charge is more positive and the chloride ions move out of the cell. Thus outside becomes more negative.
After some time of depolarization stage, potassium ions move out of the cell making the nerve cell again negative. Now the depolarized stage becomes repolarized by the entry of potassium ions.
During depolarization, the potential of the cell is -55mV. When repolarization occurs, it is again -70mV. But the potassium channels are open and some of the potassium ions move out of the cell making the inside environment more negative. This is known as hyperpolarization condition.
This hyperpolarization remains for a short period where action potential can't occur. This period is called the refractory period. Again potassium ions enter into the cell. This results in the resting potential of the neuron again.
