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Ilia_Sergeevich [38]
1 year ago
5

a tracheostomy may be indicated for which injury? a. laryngeal injury b. bronchial injury c. esophageal injury d. diaphragmatic

injury
Biology
1 answer:
dezoksy [38]1 year ago
7 0

The following injury may require a tracheostomy, according to the statement.

The best option is A.

Laryngeal injuries can be treated with intubation, cricothyrotomy, or tracheostomy. A bronchial damage is treated by bronchoscopy and conceivably with surgical repair. Esophageal injuries require immediate surgical treatment. Gastric tube insertion and surgical repair are required for the treatment of a diaphragmatic injury.

<h3>What is a tracheostomy?</h3>

A tracheostomy is a hole drilled into the front of the neck that enables tracheal intubation. If necessary, the tube can be connected to a ventilator, a mechanical breathing device, and an oxygen source.

To know more about Tracheostomy visit:

brainly.com/question/12906333

#SPJ4

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Nataly_w [17]

Question: Does geographic distance between salamander populations increase their reproductive isolation?  To answer this question, researchers studied populations of the dusky salamander (Desmognathus ochrophaeus) living on different mountain ranges in the southern Appalachian Mountains.  The researchers tested the reproductive isolation of pairs of salamander populations by leaving one male and one female together and later checking the females for the presence of sperm. Four mating combinations were tested for each pair of populations (A and B)—two within the same population (female A with male A and female B with male B) and two between populations (female A with male B and female B with male A).  The proportion of successful matings for each mating combination was measured. For example, when all the matings of a particular combination were successful, the researchers gave it a value of 1; when none of the matings were successful, they gave it a value of 0. Then the researchers calculated an index of reproductive isolation that ranged from 0 (no isolation) to 2 (full isolation). The reproductive isolation value for two populations is the sum of the proportion of successful matings of each type within populations (AA + BB) minus the sum of the proportion of successful matings of each type between populations (AB + BA).

The table (Figure 1) provides data for the geographic distances and reproductive isolation values for 27 pairs of dusky salamander populations.

Part A - Understanding experimental design

What hypothesis did the researchers test in this study?

Answer:

"Reproductive isolation increases with geographic distance between dusky salamander populations"

Explanation:

The mechanisms of reproductive isolation are a assemblage of evolutionary mechanisms, behaviors and physiological procedures dangerous for speciation. They avert followers of dissimilar types from manufacturing offspring, or confirm that any offspring are germ-free. While in allopatric speciation the reproductive isolation is resolute superficially by the spatial isolation of populations, during sympatric speciation specific groups of persons create distinct mating organizations with self-like persons while distribution the similar home with the rest of the unique inhabitants.

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Two fruit flies that are heterozygous for body color and eye color are crossed. Brown body color is dominant to black body color
Debora [2.8K]

Hi!


<h3>Let us assume that the following key:</h3>

<em>Brown Body Color</em> (Dominant) : B

<em>Black Body Color</em> (Recessive) : b

<em>Red Eye Color</em> (Dominant) : R

<em>Brown Eye Color </em>(Recessive) : r


To predict all possible phenotypes for this cross, you need to make a Punnet Square, which makes  it easier to solve dihybrid crosses (crosses involving two different traits).

The concept of this is taking each combination of the traits from the parent (BR, Br, br, bR), and crossing it with such combinations of the other parent.


<em>Refer to the attached picture for clarity.</em>


This cross will  yield a phenotypic ratio of

9 : 3 : 3 : 1

9 Dominant for both traits

3 Dominant for Eye Color, and Recessive for Body Color

3 Dominant for Body Color, and Recessive for Eye Color

1 Recessive for both traits


<h3><u>All Genotypes with Corresponding Phenotype:</u></h3>

BBRR - Brown Body, Red Eyes

BBrR - Brown Body, Red Eyes

BBRr - Brown Body, Red Eyes

bBRR - Brown Body, Red Eyes

BbRR - Brown Body, Red Eyes

BBrr - Brown Body, Brown Eyes

bBrR - Brown Body, Red Eyes

bBRr - Brown Body, Red Eyes

BbrR - Brown Body, Red Eyes

BbRr - Brown Body, Red Eyes

bBrr - Brown Body, Brown Eyes

Bbrr - Brown Body, Brown Eyes

bbRR - Black Body, Red Eyes

bbrR - Black Body, Red Eyes

bbRr - Black Body, Red Eyes

bbrr - Black Body, Brown Eyes


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mixas84 [53]

Answer:

Explanation:

Conduction

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