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3 years ago

Arrange the events of succession in their proper order.

Biology

2 answers:

ch4aika [34]3 years ago

6 0

The answer to your question is B.

forsale [732]3 years ago

3 0

Answer: b. pioneer species, soil formation, plant growth

Explanation:

An ecological succession can be define as the change in the biotic community in an ecosystem due to changes occurring in the abiotic factors (temperature, air, water, soil, and calamity) with respect to time.

b. pioneer species, soil formation, plant growth is the correct option as it is depicting the example of primary succession. A primary succession occurs in a region which was not previously occupied by any living species. For example, a receding glacier or a region which has undergone with volcanic activity. The pioneer species is the species which firstly colonize in a region and make the environment suitable for the survival of other species. Lichens are the example of the pioneer species in a primary succession. The lichens release acids which disintegrates the rocks so as to wither soil particles. The formation and aggregation of soil particles helps in the growth of plants.

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o-na [289]

Answer:

This suggests that neurons that send the signals that we perceive as first pain Myelinated Tpye A-delta___, and neurons that send the signals that we perceive as second pain Unmyelinated-Type C.___.

Explanation:

Physiologically, primary afferent neurons that innervated the the touch, pain, temperature,and pressure receptors in the effectors to input sensory signals to the spinal cord and the brain are categorized based on their diameter, sizes, and nature of myelination. Based on this;

A-alpha has the largest diameter, myelinated, and sensitive to sensation from the muscle cells

A-beta are next in diameter, myelinated and sensitive to sensation of touch.

A-delta followed in diameter, and size. They are mylinated, and sensitive to pain and temperature.

C-fibres are least in diameter, they are unmyelinated, but sensitive to pain, touch and temperature.

Therefore, if the speed of conduction,of action potential in a neuron depends on the diameter(thickness) and myelination of the axon(saltatory conduction) :

''then, acute sensation/ first pain should be transmitted by the A-delta fibre. While the the slower/second pain should be transmitted by the slower unmyelinated - C-fibres''.

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