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slega [8]
3 years ago
15

You conduct a clinical trial to test whether a new drug relieves the symptoms of arthritis better thana placebo. You have four g

roups of participants, all of whom have moderately painful arthritis (rated 7 ona scale of 1 to 10). Each group receives a daily pill as follows: group 1—placebo; group 2—15 mg; group3—25 mg; group 4—50 mg. At the end of 2 weeks, participants in each group are asked to rate their painon a scale of 1 to 10.Based on the process of science, what should your next step be?A). invest in the drug companyB). conclude that the drug relieves arthritis painC). run a statistical analysis on the data collectedD). develop a new hypothesis based on the unanalyzed data
Biology
1 answer:
Mrrafil [7]3 years ago
6 0

Answer:

C) run a statistical analysis on the data collected

Explanation:

A) False

You can only start investing in drug company after analysing all the results of the experiment, then you need to develop the drug correctly so then you can start making experiments with a larger amount of pacients to test the efiiciency of the drug so finally  you can sell it.

B) False

You can only conclude this after reviewing the results. Without analysis, nothing can be concluded.

D)False

You only start a new hypothesis after the first one has been rejected by data analysis. If the drug has no effect on patients, a new hypothesis will need to be developed. But you will only know this after analyzing the results of the experiment.

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Respiration and Photosynthesis

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2 years ago
What is the amount of heat energy needed to raise the temperature of
34kurt

Answer:

25116 J

Explanation:

Q  =  m  ×  c  × ΔT

c = 4.186 J/g°C

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Q = 200  ×  4.186 × (40-10)

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1 year ago
Predict phenotypes associated with nondisjunction of sex chromosomes.
Mnenie [13.5K]

Answer: The new daughter cells will have an abnormal amount of genetic material. That is called aneuploidy and it is the presence of an abnormal number of chromosomes. Different clinical conditions are the result of this nondisjunction.

Explanation:

Normal cells are diploids, that means they have two copies of each gene, one of each chromosome. So normal cells have two homologous chromosomes, one from each parent.

During anaphase of cell division, each pair of chromosomes is separated  by the mitotic spindle. The separated chromosomes are then pulled by the spindle to opposite poles of the cell, and eventually will end up in the new daughter cells.

Nondisjunction is the failure of homologous chromosomes to separate properly during cell division, so it is the miss segregation of them. The new daughter cells will have an abnormal amount of genetic material. <u>Different clinical conditions are the result of this nondisjunction.</u>

Sex chromosomes participates in sex determination of an individual. Females have two X chromosomes (XX), while males have one X and one Y chromosome (XY) So nondisjunction of sex chromosomes could be:

  • XX: one cell with no chromosome and the other cell with two X chromosomes.
  • XY: one cell with no chromosomes and the other cell with XY chromosomes.

According to which gametes are fused during fertilization, different phenotypes can be given. For example, if a gamete with one chromosome fuses with another gamete with two chromosomes, the result will be an individual with three chromosomes (it could be XXY, or XXX) called trisomy.

Triple X syndrome is characterized by an extra X chromosome in females. Those affected are often taller than average, but most females have a normal sexual development. Klinefelter syndrome is known XXY individuals, and it causes infertility in males, breast growth, less body hair and weaker muscles.

And if a gamete with no chromosome fuses also with another gamete with no chromosome, the result is a nullisomy. But due to the lack of genetic material, the nullisomic gametes are rendered unviable for fertilization.

And if a gamete with no chromosome fuses with another gamete with one chromosome (normal) the result is a monosomy, the presence of only one chromosome from a pair. The result can be an individual who is X or Y. People with Turner syndrome have one X chromosome and it is the only monosomy that is seen in humans because other cases monosomy are lethal.

Any of those examples is called aneuploidy and it is the presence of an abnormal number of chromosomes.

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