We have the soil, the decaying body of the host (no life, dead cell), the atmosphere and gases and temperature & climate.
The nitrogen cycle is one of the biogeochemical cycles that occurs to maintain balance and matter distributed through the biosphere. This cycle enables nitrogen to develop from a decaying organism back to the air and used again for other natural processes.
Sorry b, gonna need to know that the observations are.
Adult sponges are mobile none sessile animals
<h3><u>Answer;</u></h3>
d. a neuron recharges before it can fire again.
<h3><u>Explanation;</u></h3>
- <em><u>Refractory periods are a short phase in time following an action potential where another action potential cannot be generated. </u></em>
- <em><u>It is the period immediately following the transmission of an impulse in nerve or muscle, in which a neuron or muscle cell regains its ability to transmit another impulse. </u></em>
- There are two types of refractory period, that is the absolute refractory period and the relative refractory period. Absolute refractory period is the first part of a refractory period during which, the neuron will not fire again no matter how great the stimulation and this only lasts for a short time.
- Relative refractory period occurs when a stronger than usual stimulus is required to trigger the action potential before the neuron returns to resting state.
Answer:
To absorb water and minerals.
