Mechanisms that prevent genetic exchange between members of different species and often play a role in plant and animal speciation are termed reproductive
mechanisms.

Question

Mechanisms that prevent genetic exchange between members of different species and often play a role in plant and animal speciation are termed reproductive 
 mechanisms.

BlackTom AI · Accepted Answer

The prompt presents a fill-in-the-blank statement: 'Mechanisms that prevent genetic exchange between members of different species and often play a role in plant and animal speciation are termed reproductive ______ mechanisms.' The answer options provided are a single placeholder, 空白1, which indicates where the term should be filled.

Option evaluation:
- 空白1: This entry is not a word by itself, so it cannot convey the intended biological term. Since there are no other alternative word choices given, we rely on knowledge of standard terminology to determine the correct fill.

Reasoning about the concept: In evolutionary biology, mechanisms that reduce or prevent interbreeding between species are collectively referred to as reproductive isolation mechanisms. These can arise from prezygotic barriers (such as temporal, ecological, behavioral, or mechanical isolation) or postzygotic barriers (such as hybrid inviability or sterility). They are central to the process of speciation because they limit gene flow between populations, allowing them to diverge.

Why the concept fits here: The question explicitly describes mechanisms that prevent genetic exchange and influence speciation, which aligns with the definition of reproductive isolation mechanisms. Therefore, the term that completes the sentence is isolation in the narrow sense, or more precisely reproductive isolation, though the given answer set lists isolation as the root.

Why this is the best fit given the options: Since the only option is 空白1 (a placeholder), the intended fill based on standard terminology is 'isolation' to create the familiar phrase 'reproductive isolation mechanisms.' Other potential terms would not align with standard nomenclature for barriers to gene flow between species, so 'isolation' accurately completes the statement.

In summary, the blank should be filled with 'isolation' to reflect reproductive isolation mechanisms that prevent genetic exchange and contribute to speciation.

Mechanisms that prevent genetic exchange between members of different species and often play a role in plant and animal speciation are termed reproductive mechanisms.

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类似问题

Crosses between female horses and male donkeys produce mules. Gene flow between the gene pools of horses and donkeys is prevented by I. hybrid sterility. II. a pre-zygotic isolating mechanism. III. a post-zygotic isolating mechanism.

Differences of bird songs between two closely related species of meadowlarks represent a mechanism for

Two species of a plant cannot interbreed, because their flowers differ in size and shape and require pollination by different species of bee. This is a/an ___ isolating mechanism.

Two species of a plant cannot interbreed, because their flowers differ in size and shape and require pollination by different species of bee. This is a/an ___ reproductive barrier.

Prezygotic isolating mechanisms are typically more common than postzygotic mechanisms. One explanation is that prezygotic mechanisms are less costly in terms of and , and so natural selection has favored them.

Although they both prevent successful interbreeding among members of different species, isolating mechanisms prevent the formation of a zygote, whereas isolating mechanisms prevent successful reproduction of a hybrid after successful fertilization has occurred.

Reproductive isolating mechanisms fall into two main categories: isolating mechanisms and isolating mechanisms.

In some cases, species are defined by the ability of members to interbreed or the extent of isolation.

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