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Mnenie [13.5K]
4 years ago
7

Alleles resistant to organophosphate insecticides first appeared in Asia and were introduced into mosquito populations in the Un

ited States via _______; these alleles quickly became fixed via _______.
Biology
1 answer:
timofeeve [1]4 years ago
5 0
<h2>Mutation & genetic drift</h2>

Explanation:

  • A mutation is characterized as a lasting change to the DNA succession in a quality. This change moves the hereditary message conveyed by the quality and can modify the amino corrosive arrangement of the protein the quality encodes. This implies future cells created by the quality will just convey a specific characteristic.  
  • Genetic Drift is the change in the hereditary structure of a populace after some time because of possibility or irregular occasions. In instances of hereditary float, for example, catastrophic events or periods of irregular climate, the age that makes due to repeat won't really be the fittest, yet the most fortunate. Hereditary float doesn't allude to a particular change in hereditary cells, rather to arbitrary events that impact a population's genetic makeup.
  • Hence, the right answer of the fill up the blank is "mutation and genetic drift".

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<span>180 degrees, 120 degrees. The Carbon are all in a straight chain, with the Hydrogen at angles at the end. From VSEPR theory, the Carbons bond in an AX2 system, and the H C H bond is an AX3 system, which provide the two different angles.</span>
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The neuronal circuitry to skeletal muscles involves neurons that stimulate contractions and those that inhibit contractions. The
UNO [17]

Answer:

somatic motor neuron hyperexcitability; inhibition

The neuronal circuitry to skeletal muscles involves neurons that stimulate contractions and those that inhibit contractions. The muscle spindles and Golgi tendon organs are involved in maintaining the proper muscle tonus (resting muscle tension); they work by signaling the CNS. Since tetanus involves SOMATIC MOTOR NEURON HYPEREXCITABILITY, the neurons involved in muscle contraction INHIBITION are affected.

Explanation:

Tetanus is a infection that is caused by a bacteria called Clostridium tetani. It occurs when open wounds in the body are not properly treated and they get infected. This wound can be caused by stepping on a nail or sharp object like broken bottle.

When tetanus enters an open wound present on the body, it attacks the neurons in the body, specifically the somatic motor neurons. Tetanus hinders the release of neurotransmitters and blocks the inhibitory properties of the muscles. These causes the muscles of the body to contract unhindered and uncontrollably resulting in spasms. This can also be referred to as neuronal hyperexcitabilty.

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