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Lyrx [107]
3 years ago
6

How can we use rocks to determine how an area used to look in the past?

Biology
1 answer:
Kamila [148]3 years ago
8 0
Through looking at layers of rock you can tell what kind of things transpired. If you find Fish fossils you can assume that at one point in time, there may have been a body of water of some sort. if you find certain plants, you can deduce that there was a forest or a grassy pasture. Or if there are variations in the layer you may be able to tell what kind of soil was there at one point in time, or maybe if there is volcanic rock, you could rightly assume there was a volcanic eruption at some point.
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How many electrons fill each of the orbital levels in the diagram below?
Lapatulllka [165]
Its 18 electron

1st orbital : maximum = 2 electrons
2nd orbital : maximum = 8 electrons
3rd orbital : maximum = 8 electrons

2+8+8 = 18 electrons
8 0
2 years ago
Which of the following statements correctly describes some aspect of ATP hydrolysis being used to drive the active transport of
saw5 [17]

Answer:

B) This is an example of energy coupling

Explanation:

Energy coupling is a process by which cells carry out thermodynamically unfavorable, endergonic (energy-requiring) reactions to other exergonic (reactions that liberate free energy) reactions.

Reactions which are endergonic do not occur spontaneously as they result in a decrease in entropy and a positive free energy change, ∆G.

Exergonic reactions occur spontaneously as they result in an increase in entropy and have a negative free energy change, ∆G.

For example, the active transport of ions against their concentration gradients in cells is a non-spontaneous endergonic process which is coupled to the hydrolysis of ATP, an exergonic process in other for the reaction to proceed. ATP hydrolysis phosphorylates an amino acid side chain in the transport protein which then drives the forward process of transport of the ion.

Considering the above,

Option A: The hydrolysis of ATP is endergonic, and the active transport is exergonic is false because ATP hydrolysis is exergonic while active transport is endergonic.

Option B: This is an example of energy coupling is true.

Option C: Both ATP hydrolysis and active transport are spontaneous because they result in an increase in entropy of the system is false because only ATP hydrolysis is spontaneous

Option D: Neither ATP hydrolysis nor active transport is spontaneous is false because ATP hydrolysis is spontaneous.

Option E: ATP is acting as a transport protein to facilitate the movement of the ion across the plasma membrane is false because ATP is not a protein, rather it serves to activate the transport protein by phosphorylating it.

8 0
3 years ago
¿Cuál fue la aportación de Robert Remak a la teoría celular y su relación con Rudolf Virchow?
horsena [70]

Answer:

Corrigiendo el error de Schwann y preparando el principio de Virchow, señaló que las células se multiplican por escisión de su núcleo, no por generatio aequivoca a partir del protoplasma originario. ... Según los historiadores Pagel (1945) y Ackerknecht (1957), parece que Remak precedió a Virchow en sus descubrimientos.

Explanation:

¡espero que esto ayude!

4 0
3 years ago
In airports, the control tower functions in directing air traffic and keeping all flights running smoothly like a command center
aleksklad [387]
The answer is B the nucleus 
Hope this helps :)
3 0
3 years ago
Read 2 more answers
The Piney Woods ecoregion in Texas receives more than 50 inches of rain each year and is home to many different species of plant
Marysya12 [62]

Answer:

long ansr ha but its question is wrong

8 0
2 years ago
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