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vodka [1.7K]
3 years ago
11

Animal life appeared on land before in the water. True False

Biology
1 answer:
spayn [35]3 years ago
6 0
The answer is False, life on earth originated from water creatures who emerged from the seas to colonize land. 
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Based on fossil data, the researcher estimates that humans and their most closely related species in the data set diverged appro
tester [92]

Answer:

Hello your question is incomplete attached below is the complete question

answer : = 1.25

Explanation:

i) Determine the rate of mtDNA percent divergence

From the data given the most closely related specie is Chimpanzee ( 8.8 sequence  difference )

Note : Given that this divergence took place seven million years from now

∴The rate of mtDNA percent  divergence per 1 millions years

= 8.8 / 7 = 1.25

5 0
3 years ago
You've been experiencing acid indigestion lately, and you'd like a quick fix for the problem. You do a little research on the In
Licemer1 [7]

Answer:

<em>C: After 1 hour, the pH of the solution in the PEPCID AC beaker was 9.2 and the pH of the solution in the Alka-Seltzer beaker was 8.3</em>

Explanation:

The degree of acidity or alkalinity/basicity of a substance is its pH. The value of pH ranges from 1 to 14 with the former being extreme acidity and the latter being extreme alkalinity while pH 7 is considered neutral.

Hence, any pH below 7 is considered acidic and above 7 is considered alkaline.

Reactions involving equal volumes of an acid and a base can end in acidic, alkaline or neutral pH depending on the strength of the acid/base involved;

  • Equal volumes of strong acid with strong base will result in neutral pH
  • Equal volumes of weak acid with strong base will result in alkaline pH
  • Equal volume of strong acid with weak base will result in acidic pH

If substance A and B reacts with equal volume of the same acid under the same condition and the end result of A is a solution with pH of 9.2 and that of B is a pH of 8.3, it simply means substance A is a stronger base than substance B.

<em>Hence, the only outcome that supports the hypothesis that a tablet of PEPCID AC can neutralize more stomach acid than a tablet of Alka-Seltzer is that the pH of the solution in the PEPCID AC beaker was 9.2 and the pH of the solution in the Alka-Seltzer beaker was 8.3 after being subjected to the same condition.</em>

If an indigestion is due to excess stomach acid, the only way to reduce the acidity is to consume a substance that will decrease the degree of acidity in the stomach. This means that the patient will need to consume something that is alkaline in order to increase the pH.

8 0
3 years ago
A man digging a pit found that he could dig with ease initially but digging became difficult as he went deeper. He could not dig
belka [17]

Answer:

The first layers of earth are very loose, unconsolidated layers called soil, which is pretty easy to dig into, but as we go deeper we reach the bedrock, which is the hardest part of the soil profile, which is made of hard rocks and matter.This makes it harder to dig more and more deeper.

Explanation:

5 0
2 years ago
Which organism can process more complex information due to a central brain?
aleksandrvk [35]
The answer is D. Fish
7 0
3 years ago
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Lamarck's idea of "Use and Disuse" proposed that
gregori [183]
The answer is, acquired traits are passed down from parent to offspring.



3 0
3 years ago
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