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stepan [7]
3 years ago
5

Helppp me A,B,C,D I need help choose one for me

Biology
1 answer:
Shkiper50 [21]3 years ago
5 0

Answer:

<em><u>A. Neither the subjects nor the researchers can bias the results.</u></em>

Explanation:

As described, a double- blind study is one in which the researcher and his study does not know the person receiving the actual treatment.

Researchers can be bias in their studies as they seek to establish and fine tune results in the way the best favors them. A double-blind study helps to bridge this gap to prevent bias that might be introduced into an experimental set up or while interpreting results.

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More advanced than tools used on earth
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How do the respiratory and excretory systems work together to help people grow and survive
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Answer:

respiratory and excretory systems are among the two vital systems in our body which work in order to maintain our health or keep our body fit

Explanation:

Respiratory systems comprises of organs like lungs to inhale oxygen and exhale carbon dioxide out of our body. The oxygen is then mixed with blood by the heart and reaches different parts of our body.

Excretory system is responsible for excreting or expelling the waste out of our body to keep our body free from toxins and harmful chemicals.

excretory system works with respiratory system to get rid of water vapors and carbon dioxide in the human body.

4 0
3 years ago
Nails are an extension of what layer of the epidermis?
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<h2><em><u>The Squamous Cell Layer</u></em></h2>

Explanation:

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8 0
3 years ago
Read 2 more answers
Purple flowers are dominant to white flowers. A heterozygous purple flower is crossed with a white flower. What are the probabil
Zanzabum

Answer:

50% probability of Pp (purple) or pp (white) genotype.

Explanation:

P = purple gene

p = white gene

Punnet squares show the possible genotypes and probabilities of each genotype in the offspring of a cross:

Purple flower genotype (heterozygous) = Pp

White flower genotype = pp

Punnet Square:

\left[\begin{array}{ccc}&P&p\\p&Pp&pp\\p&Pp&pp\end{array}\right]

Potential genotypes for offspring are Pp and pp;

According to the Punnett square, 2 of 4 offspring will have the Pp genotype and the other 2 will have pp genotypes;

This means 2 should be purple and 2 white;

Or, there is a 50% chance of having either genotype, of being purple or white.

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3 years ago
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