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sattari [20]
3 years ago
11

In october of 2003, a raging wildfire swept through the mountain ecosystems in southern california, burning everything in its pa

th to the ground and driving away all of the animals. in order for the mountain ecosystem to re-establish itself, which member of the food web has to return first?
a. deer
b. snakes
c. birds
d. coyotes
e. grasses
Ask for details Follow Report by Ravenqueen7989 08/24/2018
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Biology
2 answers:
Maurinko [17]3 years ago
8 0

Answer:

uhhhhhhhhhhhhh

Explanation:

podryga [215]3 years ago
6 0

Answer:

The correct answer will be option- grasses

Explanation:

The forest area destroyed by the fire takes place through a process known as secondary succession.

The process of secondary succession represents the series of the changes in the community on the damaged or disturbed habitat.

The pioneer primary species of the secondary succession are the herbaceous plants like grasses, ferns or conifers.

Thus, grasses are the correct answer.

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According to the gate control theory of pain, how do gate neurons inhibit pain neurons? select one:
harkovskaia [24]

The gate control theory of pain states that the experience of pain is dependent on the complex interaction of the central and the peripheral nervous system. This theory was given by Ronald Melzack and Patrick Wall.

Usually, when a person experiences pain, the neurons transmits the message from the area of damage along the peripheral nervous system to the spinal cord and the brain.  The gate control theory suggests that the neurons encounter the 'nerve gates' while transmitting the pain messages in the spinal cord. These opening and closing of these gates is dependent on the multiple factors.  

The basket cells are the multipolar, inhibitory interneurons . Endorphins are the neuropeptide and the peptide hormones, which are secreted by the central nervous system and the pituitary gland. These structures have no relation with the transmission of the pain.

The hyperpolarization of the neurons by the opiate receptors resulting in the release of the substance P, which is a neurotransmitter involved with pain.

Hence, the correct answer is 'by releasing substance P'.

5 0
3 years ago
What factors influence gene flow between populations? 1. Differences in animal behavior and life history strategies can form eff
Whitepunk [10]

Answer:

All these factors affect gene flow:

1. Differences in animal behavior and life history strategies can form effective barriers to gene flow.

2. The home range size of the specie can also serve as a barrier to gene flow.

Explanation:

Firstly, gene flow is the transfer of genetic traits from one population to another. It is an important process for transferring genetic variations from one population to another.

There are several barriers or factors that limit or increase this gene flow.

Gene flow can be affected by mobility or rate of dispersal. It is expected to be lower in species with low mobility which is the movement from one place to another or low dispersal and vice versa. So a population with a shorter home range size can't effective aid gene flow as they interact only with individuals of the same population and vice versa.

Gene flow barrier could be by physical barriers which is the isolation of a geographical location preventing them from exchanging genetic materials with the same species of the sane population.

This type of physical barrier is usually but not always natural.

Barrier to gene flow could be reproductive preventing transfer of genectic materials due to differences in mating period, season of birth and so on.

Another barrier could be difrerneces in customs, ethnicity, religion and clans.

All these factors affect gene flow but the 3rd and 4th option are not totally true as barriers to gene flow are not totally physical geographical barriers and not totally anatomical differences but also soil preference and other factors.

Thanks.

3 0
3 years ago
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Sal is at risk of experiencing schizophrenia disorder.<span />
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Cant tell you the types, but they form from the weather elements, from being compressed, etc
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