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telo118 [61]
4 years ago
15

A 55-year old man is referred to your clinic. he has been sedentary all of his life, is gaining weight and wishes to get into be

tter physical shape. he has never had any chest pain or shortness of breath when walking or climbing a flight of stairs. before recommending a vigorous exercise routine for this patient, you order what test?
Biology
1 answer:
dusya [7]4 years ago
8 0

In the given case, the client is recommended for ETT, that is, an Exercise Treadmill Test.  

Various patients have underlying CAD, that is, coronary artery disease, however, it remains asymptomatic. Thus, prior to starting any new kind of intense activities after years of a sedentary lifestyle, it is suggested that the person should go for ETT to rule out any kind of underlying CAD.  

An ETT records the heart's electrical activity on an ECG and takes the readings of blood pressure while one walks on a treadmill. It is usually done to check for any kind of heart disease, or to find of the treatment for heart ailment is efficient.


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Consider a locus with two alleles - B and b. B is dominant, while b is recessive. There is no mutation. B has a selective advant
Marat540 [252]

Answer:

0.09

Explanation:

<h3><u>Before selection</u></h3>

Total number in population = 1000

Genotype frequencies

Genotype frequency of BB = 500/1000 = 0.5

Genotype frequency of Bb = 250/1000 = 0.25

Genotype frequency of bb = 250/1000 = 0.25

Allele frequencies

Allele frequency of B = BB genotype frequency + half of the Bb genotype frequency = 0.5 + (0.25/2) = 0.625

Allele frequency of b = bb genotype frequency + half of the Bb genotype frequency = 0.25 + (0.25/2) = 0.375

<h3><u>After selection</u></h3>

We are told that after selection, the genotype frequency of bb is changed as they become 50% less fit. This means the frequency of bb individuals changes from 250 to 125 individuals (50% reduction).

Now the total number of individuals is 500 + 125 + 250 = 875.

Genotype frequencies

Genotype frequency of BB = 500/875 = 0.57

Genotype frequency of Bb = 250/875 = 0.29

Genotype frequency of bb = 125/875 = 0.14

Allele frequencies

Allele frequency of B = BB genotype frequency + half of the Bb genotype frequency = 0.57 + (0.29/2) = 0.715

Allele frequency of b = bb genotype frequency + half of the Bb genotype frequency = 0.14 + (0.29/2) = 0.285

<h3><u>Change in frequency of B after 1 generation</u></h3>

0.715 - 0.625 = 0.09

7 0
3 years ago
State any eight point about China Rose.​
AnnZ [28]

Eight point about China Rose.

3 0
3 years ago
As a doctor, you are examining a patient who recently experienced some liver damage as a side effect of the medication that she
adell [148]

Of about 3-4 days in most cases. With severe damage it can take up to 30.

4 0
3 years ago
All eukaryotic cells have a mitochondria, but only plants and some photosynthetic protists have chloroplasts. Which of the follo
disa [49]

Answer:

B

Explanation:

<u>The correct statement to be inferred from the information would be that all eukaryotic cells need to produce energy</u>.

<em>The mitochondrion is an organelle that is referred to as the powerhouse of the cell. It is the site of oxidative phosphorylation where the energy for the cell's metabolic processes is generated. Hence, if all eukaryotic cells have mitochondrion, it means that they all need to produce energy for their metabolic activities.</em>

The correct option is B.

4 0
3 years ago
What happened to the Galapagos Finches?
IceJOKER [234]

Answer:

Unavailability of food decrease their population.

Explanation:

The population of Galapagos Finches decreases because of unavailability of food. Galapagos Finches feeds on a specific insects whose population decreases on that Island that leads to the death of the Galapagos Finches and they decrease in number. Positive population  growth occurs only if more food is available to the Finches or they adapt another food item for themselves which fulfill their need of food.

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3 years ago
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