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vekshin1
3 years ago
13

Which of the following steps will slow down the reaction between coal and oxygen? Increase the temperature of coal Keep the coal

in a wide dish Keep the coal in a narrow test tube Decrease the temperature of oxygen
Biology
2 answers:
SIZIF [17.4K]3 years ago
5 0

Answer:

decrease temperature of oxygen.

marusya05 [52]3 years ago
3 0
D, decrease temperature of oxygen.
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When doing medical research with human subjects, which FOUR limitations are unavoidable?
liq [111]

Answer:

Option B, C, D and E

Explanation:

While conducting research on human being, following conditions must be fulfilled

a) The subject must be made aware of the risk and result of the study

b) Subject must be aware of the study objective, time duration and post study impacts

c) Subject must be compensated for any injury caused during the study

d) Informed consent must be taken from the subject

e) The subject must beware of the possible uncontrollable scenarios. Also the test conducted must be testifiable on human being

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Considering the above facts, option B , C, D and E are unavoidable  

7 0
3 years ago
What is the difference between phenotypes and genotypes​
Nonamiya [84]
Phenotypes are the physical makeup of a living thing and genotypes are the genetic makeup of the living thing
4 0
3 years ago
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A population of wild-flowers was scored for flower color. There were 302 blue (BB) plants, 1857 violet (BR) plants and 811 red (
Paul [167]

Answer:

frequency of the blue (B) allele = 0.4142

frequency of the red (R) allele = 0.5858

The number of blue plants expected is 509.652

The number of red plants expected is 1019.304

The anticipated number of violet plants is 1441.341

Calculated chi square value

= 84.5320 + 42.5688 + 119.8692\\= 246.97

Explanation:

Frequency of blue allele is

Frequency of blue allele is equal to sum of frequency of BB and half of frequency of BR

\frac{302}{2970} + \frac{1}{2} \frac{1857}{2970} \\= 0.1016 + 0.3126\\= 0.4142

Frequency of other allele

1- 0.4142\\= 0.5858

Chi Square test

See the attached file

The number of blue plants expected is 509.652

The number of red plants expected is 1019.304

The anticipated number of violet plants is 1441.341

Calculated chi square value

= 84.5320 + 42.5688 + 119.8692\\= 246.97

7 0
3 years ago
where did the rats come from and why did they have a negative effect on the palm trees on Easter Island
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In one of the studies of about rats in Easter Island, it was believed that rats were the reason for the decrease of palm trees. 
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<span>The number of palm trees decreases because of the increased number of rats that eats its fruits. Seed germination became frequently interfered because of this activity. 
</span><span>However, the slow growth of palm trees was also blamed for the tree cutting off the people.</span>
5 0
3 years ago
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Define the term “fitness”
liq [111]
The condition of being physically fit and active
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