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Sourav PanSeptember 10, 2024

The fossil record indicates that in some cases reasonably well-defined species appear suddenly and remain unchanged for a long time before they become extinct. This phenomenon is referred to as a) allopatric speciation b) sympatric speciation c) phyletic gradualism d) punctuated equilibrium e) parallel evolution

The fossil record indicates that in some cases reasonably well-defined species appear suddenly and remain unchanged for a long time before they become extinct. This phenomenon is referred to as
a) allopatric speciation
b) sympatric speciation
c) phyletic gradualism
d) punctuated equilibrium
e) parallel evolution

Cite this post:

Sourav Pan. (2024, September 10). The fossil record indicates that in some cases reasonably well-defined species appear suddenly and remain unchanged for a long time before they become extinct. This phenomenon is referred to as a) allopatric speciation b) sympatric speciation c) phyletic gradualism d) punctuated equilibrium e) parallel evolution. Biology Notes Online. Retrieved from https://biologynotesonline.com/qa/the-fossil-record-indicates-that-in-some-cases-reasonably-well-defined-species-appear-suddenly-and-remain-unchanged-for-a-long-time-before-they-become-extinct-this-phenomenon-is-referred-to-as-a-all/

Sourav Pan. "The fossil record indicates that in some cases reasonably well-defined species appear suddenly and remain unchanged for a long time before they become extinct. This phenomenon is referred to as a) allopatric speciation b) sympatric speciation c) phyletic gradualism d) punctuated equilibrium e) parallel evolution." Biology Notes Online, 10 September 2024, biologynotesonline.com/qa/the-fossil-record-indicates-that-in-some-cases-reasonably-well-defined-species-appear-suddenly-and-remain-unchanged-for-a-long-time-before-they-become-extinct-this-phenomenon-is-referred-to-as-a-all/.

Sourav Pan. "The fossil record indicates that in some cases reasonably well-defined species appear suddenly and remain unchanged for a long time before they become extinct. This phenomenon is referred to as a) allopatric speciation b) sympatric speciation c) phyletic gradualism d) punctuated equilibrium e) parallel evolution." Biology Notes Online (blog). September 10, 2024. https://biologynotesonline.com/qa/the-fossil-record-indicates-that-in-some-cases-reasonably-well-defined-species-appear-suddenly-and-remain-unchanged-for-a-long-time-before-they-become-extinct-this-phenomenon-is-referred-to-as-a-all/.

Avatar for Sourav Pan
Sourav PanMay 15, 2025

Answer: d) punctuated equilibrium
Explanation: Punctuated equilibrium describes the pattern where species remain unchanged for long periods and then experience rapid evolutionary changes.

Cite this post:

Sourav Pan. (2024, September 10). The fossil record indicates that in some cases reasonably well-defined species appear suddenly and remain unchanged for a long time before they become extinct. This phenomenon is referred to as a) allopatric speciation b) sympatric speciation c) phyletic gradualism d) punctuated equilibrium e) parallel evolution. Biology Notes Online. Retrieved from https://biologynotesonline.com/qa/the-fossil-record-indicates-that-in-some-cases-reasonably-well-defined-species-appear-suddenly-and-remain-unchanged-for-a-long-time-before-they-become-extinct-this-phenomenon-is-referred-to-as-a-all/

Sourav Pan. "The fossil record indicates that in some cases reasonably well-defined species appear suddenly and remain unchanged for a long time before they become extinct. This phenomenon is referred to as a) allopatric speciation b) sympatric speciation c) phyletic gradualism d) punctuated equilibrium e) parallel evolution." Biology Notes Online, 10 September 2024, biologynotesonline.com/qa/the-fossil-record-indicates-that-in-some-cases-reasonably-well-defined-species-appear-suddenly-and-remain-unchanged-for-a-long-time-before-they-become-extinct-this-phenomenon-is-referred-to-as-a-all/.

Sourav Pan. "The fossil record indicates that in some cases reasonably well-defined species appear suddenly and remain unchanged for a long time before they become extinct. This phenomenon is referred to as a) allopatric speciation b) sympatric speciation c) phyletic gradualism d) punctuated equilibrium e) parallel evolution." Biology Notes Online (blog). September 10, 2024. https://biologynotesonline.com/qa/the-fossil-record-indicates-that-in-some-cases-reasonably-well-defined-species-appear-suddenly-and-remain-unchanged-for-a-long-time-before-they-become-extinct-this-phenomenon-is-referred-to-as-a-all/.

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