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3 years ago

a meniscus in a test tube forms when water curves slightly upward at the edge near the glass. This is due to

Biology

2 answers:

Bingel [31]3 years ago

8 0

Volume the volume of the test tube is approximately 35cm so the water is 20m/cw idk if this helps

Hitman42 [59]3 years ago

7 0

This would be due to Cohesion

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The department of nursing at a local hospital is considering changing to charting by exception (CBE). Which statement provides a

ira [324]

Answer:

Option A, Reduces the time nurses spend charting

Explanation:

Charting by exception or CBE and is a documents that consists of –

a) Set standards of practice and regulations

b) Findings along with exceptions and explanations against the predefined norms

c) Methods and criteria of checkups and assessments

This document in turn reduces the effort of a nurse writing facts and observation in details which shall be put in front the doctor for in-depth observations.

Hence, option A is correct

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2 years ago

What is the difference between chromosomes, chromatin, and DNA? I

Lina20 [59]

Answer:

A chromosome is a long DNA molecule with part or all of the genetic material of an organism. and I can't think of the other one sorry.

Explanation:

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2 years ago

Two insecticides will be compared for their effectiveness in eliminating aphids on tomato plants. Forty tomato plants of the Big

densk [106]

Answer:

The t-test

Explanation:

The researcher should use a t-test to compare the two means and check if they are significantly different from each other.

In using the t-test, both null (H0) and alternate (H1) hypothesis are made such that:

H0: n1 = n2
H1: n1≠ n2

Thereafter, the value of t is calculated and compared to its critical value on the table. The formula for calculating the t goes thus:

$t = \frac{Y_1 - Y_2}{\sqrt{\frac{S_1}{n_1} + \frac{S_2}{n_2} } }$

where, Y1 = mean of population 1, Y2 = mean of population 2, S1 = variance of population 1, S2 = variance of population 2, n1 = number of individuals in population 1 and s2 = number of individuals in population 2.

At the end of the day, if the calculated t value is more than the critical value of t, the H0 is rejected and it shows that the two means are significantly different. Otherwise, the H0 is accepted and this shows that there is not significant difference between the mean of population 1 and that of 2.

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3 years ago

Which mineral would be found in greatest concentration in the plasma of the marathon runners?

andre [41]

The right answer is E. Sodium (with 140mmol/L)

Sodium is the most important element in the blood and extracellular liquids of the body.The needs of an adult subject are of the order of 1 to 2 g of sodium per day. The normal diet is much richer than our actual needs, about 4g, so it can largely compensate for the needs of an athlete or a runner.
Losses are majoritarly by feces and sweat. The kidney is able to reabsorb almost all the sodium that is filtered: urinary losses can be tiny.

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3 years ago

Explain why an mRNA transcribed from the template strand of the SIRT3 gene in normal stomach ( NS ) cells is translated to produ

Ivanshal [37]

Answer:

Explanation:

The double-stranded DNA molecule has the potential to store genetic information in either strand, although in most organisms only one strand is used to encode any particular gene.

The template strand is the non-coding strand. The coding strand of DNA is the non-template (mRNA-like) strand (see attachment).

Thus, genetic information is expressed by transcription of the non-coding (template) strand of DNA, which produces an mRNA molecule that has the same sequence as the coding strand of DNA. Therefore, if a mRNA is transcribed from the non-template strand, the genetic information will not be contained in that strand and it would not produce a correct protein.

6 0

3 years ago