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QveST [7]
2 years ago
13

Which statement correctly summarizes Wegener's theory of continental drift?

Biology
2 answers:
aleksandr82 [10.1K]2 years ago
7 0
The last option: over tens of millions of years, the giant supercontinent Pangaea began to slowly drift apart forming the continents
Oksana_A [137]2 years ago
5 0

Answer: Option D

Explanation:

The Continental drift can be defined as the theory that states that the sub continents that are seen today were once a large content.

The continents separated into small parts over a period of time and are known as sub continents today.

The Giant super continent Pangaea began to drift apart and formed into small continents that are known today.

This theory was given by Alfred Wegener and is known as Wegener's theory of continental drift.

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3. The human body has devised an excellent method to keep the body pH under control. a. What principle underlies the constant pH
kumpel [21]

The normal blood pH for adult humans is 7.40, and this pH value is vigorously defended at normal body temperature

Acid base Homeostasis is the method by which body keeps a constant ph
pH is kept under check via different systems
1. Chemical system :bicarbonate buffer system(explained below )
Respiratory component :
2. Respiratory Component: The second line of dense is rapid consisting of the control the carbonic acid concentration in the ECF by changing the rate and depth of breathing by hyperventilation or hypoventilation. This blows off or retains carbon dioxide (and thus carbonic acid) in the blood plasma as required

3.Metabolic component : third line of defense is slow, best measured by the base excess,eand mostly depends on the renal system which can add or remove bicarbonate ions to or from the ECF.Bicarbonate ions are derived from metabolic carbon dioxide which is enzymatically converted to carbonic acid in the renal tubular cells.There, carbonic acid spontaneously dissociates into hydrogen ions and bicarbonate ions.When the pH in the ECF falls, hydrogen ions are excreted into urine, while bicarbonate ions are secreted into blood plasma, causing the plasma pH to rise.The converse happens if the pH in the ECF tends to rise: bicarbonate ions are then excreted into the urine and hydrogen ions into the blood plasma.




Buffers usually consist of a weak acid and its conjugate base; this enables them to readily absorb excess H+ or OH–, keeping the system’s pH within a narrow range.

Maintaining a constant blood pH is critical to a person’s well-being. The buffer that maintains the pH of human blood involves carbonic acid (H2CO3), bicarbonate ion (HCO3–), and carbon dioxide (CO2). When bicarbonate ions combine with free hydrogen ions and become carbonic acid, hydrogen ions are removed, moderating pH changes. Similarly, excess carbonic acid can be converted into carbon dioxide gas and exhaled through the lungs; this prevents too many free hydrogen ions from building up in the blood and dangerously reducing its pH; likewise, if too much OH– is introduced into the system, carbonic acid will combine with it to create bicarbonate, lowering the pH.
Example: Antacids, which combat excess stomach acid, are another example of buffers.


ECF =Extra cellular fluid




5 0
2 years ago
Choose all the answers that apply. Which of the following products is made using wood?
muminat
All of the above are made using wood.
8 0
3 years ago
Read 2 more answers
Scientific notation is a way of making numbers scientific<br><br> A.True<br> B.False
MissTica

Answer:

False

Explanation:

Scientific notation is the use of x x 10^x to write very large numbers in a shorter form.

3 0
2 years ago
Read 2 more answers
1. How are populations of chimpanzees affected by slash and burn agriculture? 2. Which features of chimpanzees make them more di
sergij07 [2.7K]

Answer:

1. Slash and Burn agriculture refers to a technique of farming that requires plants in a forest or woodland to be decimated to create a cultivable expanse of land.

Some of these plants are usually homes to wild chimpanzees. The more they are cut down, the deeper into the forests they would migrate, that's if they ever find a place like it.  

2. When compared to the other primates such as monkeys, baboons, etc their larger body size, puts them at a disadvantage. This is because when they are placed in a restricted space, they need more food which in turn translates to increased height and weight.

Cheers!

8 0
3 years ago
What is a global climate model?
marusya05 [52]

Answer:

What is a Global Climate Model? A global climate model (GCM) is a complex mathematical representation of the major climate system components (atmosphere, land surface, ocean, and sea ice), and their interactions. Earth's energy balance between the four components is the key to long-term climate prediction.

Explanation: do you want a model?

3 0
2 years ago
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