If a cell membrane became impermeable, instead of selectively permeable, the cell would not remain alive, though certain organisms would be able to stay alive longer than others. This is because the cell membrane allows essential molecules and substances such as oxygen into the cell, while allowing harmful substances, like waste, out of the cell.
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Most metamorphic processes take place B. a few kilometers below Earth’s surface.
<h3>Further explanation
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Metamorphism is the change of minerals or geologic texture in pre-existing rocks without the protolith melting into liquid magma. Metamorphism often occurs on two scales: contact and regional. Contact metamorphism occurs locally in areas adjacent to igneous intrusions or in areas that are in contact with hot water known as hydrothermal fluids. Whereas regional metamorphism occurs over much larger areas such as rising mountain ranges, large igneous intrusions can form and warp overlying strata increasing the pressures above the intrusion. Regional metamorphism usually produces foliated rocks such as gneiss and schist.
There are other ways that metamorphic rocks can form, Dynamic metamorphism. Dynamic Metamorphism also occurs because of mountain-building. The huge forces of heat and pressure cause the rocks to be bent, folded, crushed, flattened, and sheared.
Metamorphic rocks form when increased heat and pressure force physical changes in the crystalline structure of an existing rock. Under the right conditions, any type of rock can become a metamorphic rock including igneous rocks, sedimentary rocks, and even other metamorphic rocks. Therefore metamorphic processes result due to intense heat and high pressure below the Earth's surface.
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<h3>Answer details</h3>
Grade: 9
Subject: biology
Chapter: metamorphic processes
Keywords: metamorphic processes
more panthers were born than died. more panthers were born than died
The population of the Florida panther once dwindled to below two dozen, but it has since rebounded to more than 200
<h3>What is the panther population in Florida ?</h3>
Today there are only 120 to 130 Florida panthers left in the wild. They are found in southern Florida in swamplands such as Everglades National Park and Big Cypress National Preserve
- Florida's largest wild cat species, the panther is critically endangered, but has been making a slow and steady comeback since numbers sunk to just 20 individuals in the 1970's. As of 2021, most estimates place the present day population at around 200.
- By far the greatest threats to Florida panthers are habitat loss, fragmentation and degradation — all driven by Florida's burgeoning human population and the developments and highways that accommodate it.
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An action potential is an excitatory presynaptic nerve. An EPSP (Excitatory postsynaptic potential) takes place in the dendrites of the postsynaptic nerve. This spreads passively to the axon hillock. Depolarization of this region opens voltage-gated ionic channels. Sufficient membrane depolarization to threshold opens enough to these channels to produce an action potential.
Non myelinated axon; the currents associated with the action potential spread to the depolarized region of the axon.
In myelinated axon; the currents associated with the action potential spread to the next Node of Ranvier.
The action potential travels down the axon to the axon terminals.
