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victus00 [196]
3 years ago
13

According to the _____ model, evolution occurs in spurts; species evolve relatively rapidly then remain unchanged for long perio

ds.
Biology
1 answer:
Vlada [557]3 years ago
8 0

Answer:

According to the <u>punctuated equilibrium</u> model, evolution occurs in spurts; species evolve relatively rapidly then remain unchanged for long periods.

Explanation:

The theory of punctuated equilibrium maintains that during most of the time of existence of a species it would remain stable or with minor changes, that is, in periods of stasis or periods of morphological stability, followed by rapid and abrupt events of evolutionary changes.  This model was proposed by evolutionary biologist and paleontologist Stephen Jay Gould and his colleague Niles Eldrege. This theory includes the phenomena of stasis and the sudden or instantaneous appearance of forms in the normal process of speciation, that is, formation of new species.

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Answer: hello your question has some missing data attached below is the missing data

Applying the Michaelis-Menten Equation

An enzyme is found that catalyzes the reaction X ⇋ Y Researchers find that kcat for this enzyme is 600s^-1 and carry out several additional experiments.

answer :

substrate concentration [ x ] = 10⁻⁵ M

Explanation:

Given data:

[Et ] = 10 * 10⁻⁹ M ,  

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applying Michaelis-Menten  Equation

= 3* 10⁻⁶ = \frac{600 *10*10^{-9} * (X)  }{10^{-5} + (X) }  ,    

= ( 3 * 10⁻⁶ )( x ) + ( 3 * 10⁻¹¹ ) = ( 6 * 10⁻⁶ ) ( x )

hence the substrate concentration [ x ] = 10⁻⁵ M

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