Suppose that you began a one-year study of tuberculosis (TB) in St. Petersburg on January 1st, 2018. You enrolled 200 residents in your study and checked on their TB status on a monthly basis. At the start of your study on January 1st, you screened all 200 residents. Upon screening, you found that 10 of the healthy residents were immigrants who were vaccinated for TB and so were not at risk. Another 10 residents already had existing cases of TB on January 1st. On February 1st, two residents developed TB. On April 1st, three more residents developed TB. On July 1st, three of the residents who had existing TB on January 1st died from their disease. The study ended on December 31, 2018. Assume that once a person gets TB, they have it for the duration of the study, and assume that all remaining residents stayed healthy and were not lost to follow-up.What was the prevalence of TB in the screened community on January 1st?

Answers

Answer 1

Answer:

Answer: 5%

Explanation:

The Prevalence rate is the term used to describe the percentage of a population that have contacted the disease being tested for. It is usually done over a certain period or a certain time.

The prevalence of TB in the screened community on January 1st therefore is;

= Number of infected/ No. of Tested residents

= 10/200

= 5%

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Describe how the bodyâ€™s mechanisms maintain homeostasis?

Answers

Answer: The body maintains homeostasis by positive and negative feedback mechanism.

Explanation:

The body maintains the internal temperature and metabolism with respect to change in environment.

In case the temperature outside is very cold and the body starts shivering by the movement of skeletal muscles, this is done to maintain the temperature inside body. This is positive feedback.

When the temperature inside the body is maintained, then body stops shivering. This is negative feedback.

This is how the body maintains homeostasis.

Which tool is generally used to compare the masses of objects? *1 point
A meter stick
A two-pan balance
A hot plate
A graduated cylinder

Answers

Answer:

A two pane balancer that one

The answer is a two- pan balance

(30 points) {Brainliest} help me plz <3An experimental pharmaceutical is typically approved after it passes which phase of clinical trials?

A. 4
B. 2
C. 3
D. 1

Answers

An experimental pharmaceutical is typically approved after it passes 4 phase of clinical trials.

What is clinical trial ?

Clinical trials are combination of new research, studies and experiments performed in people to evaluate the effectiveness of new experiment on human health.

It consists of main 4 phases.

Phase 4 clinical trial is also known as " Post-Approval Research and Monitoring ". It is the final stage of trial for any pharmaceutical product, drug or device. This trial study about the side effects, real life scenarios, long-term risks and benefits of particular pharmaceutical product which were not seen in the early trials.

So we can sayan experimental pharmaceutical can be approved when it passes 4 phases of clinical trials.

To know more about phases of clinical trial please click here : brainly.com/question/3429518?utm_source=android&utm_medium=share&utm_campaign=question

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Condylomata are _____.

Answers

Condylomata are genital warts

Answer:

Genital Warts.

Explanation:

-Hoped it helped.

Pink eye is a recessive trait found in deer mice. In a cross between two individuals, both of whom are heterozygous for the pink eye mutation, the following offspring are obtained:Normal 18

Pink eye 2

Use the chi-square test to determine if the observed numbers of offspring fit the expected numbers of offspring from this cross. The value of is: ____________

Answers

Answer:

See the answer below

Explanation:

If pink eye is recessive, it means that the normal eye is the dominant trait. According to Mendelian law, the ratio of normal to pink eye in a cross involving two heterozygous mice should be 3:1.

Chi-square = $((O - E)^2)/(E)$ where O = observed frequency and E = expected frequency.

Phenotype Observed Expected Chi-square

Normal 18 3/4 x 20 = 15 $((18 - 15)^2)/(15)$ = 0.6

Pink 2 1/4 x 20 = 5 $((2 - 5)^2)/(5)$ = 1.8

Total Chi-square = 0.6 + 1.8 = 2.4

Degree of freedom = 2 - 1 = 1

Critical Chi-square value at 95% = 3.841

The critical Chi-square value is more than the calculated value. Hence, the observed number of offspring fits the expected number of offspring.

Which phrase does not describe asexual reproduction in organisms?1-little variation in offspring
2-duplicates its genetic material
3-only one type of cell involved
4-requires two parents