Question at position 33 A Martian probe brings back a soil sample that contains stretches of DNA that are similar to life on Earth. This evidence would support which hypothesis? Panspermia"RNA world"AbiogenesisNot enough informationClear my selection单项选择题
A
Panspermia
B
"RNA world"
C
Abiogenesis
D
Not enough information

Question

Question at position 33 A Martian probe brings back a soil sample that contains stretches of DNA that are similar to life on Earth. This evidence would support which hypothesis? Panspermia"RNA world"AbiogenesisNot enough informationClear my selection单项选择题

A

Panspermia

B

"RNA world"

C

Abiogenesis

D

Not enough information

BlackTom AI · Accepted Answer

The question describes a Martian probe returning a soil sample that contains stretches of DNA similar to life on Earth, and asks which hypothesis this would support.
Option 1: Panspermia. This hypothesis posits that life, or its genetic material, can be transferred between planets. Finding Earth-like DNA sequences in Martian material would be consistent with the idea that life or its building blocks traveled from one planet to another, lending support to panspermia as a plausible mechanism. It points toward a shared or transferable origin rather than an Earth-only origin.
Option 2: "RNA world". The RNA world hypothesis suggests that early life relied on RNA-based replication before DNA and proteins, but the discovery described is about sequences similar to Earth-based DNA rather than evidence about the early RNA world stage. The finding does not specifically indicate an RNA-based origin predominance, so this option is not the best fit given the scenario.
Option 3: Abiogenesis. Abiogenesis refers to the origin of life from nonliving chemistry on a given planet, typically discussed in the context of how life arose on Earth. While abiogenesis is related to the broader question of how life begins, the detection of Earth-like DNA on Mars more directly implies a transfer or shared origin rather than an independent Earth-bound origin on Mars, making this option less directly supported by the evidence as stated.
Option 4: Not enough information. The scenario provides a concrete observation (Earth-like DNA in Martian soil) that strongly informs discussions about cross-planetary transfer of genetic material. While not ruling out contamination or other issues, the evidence does give a basis for considering panspermia as a viable hypothesis, so this option is not the best choice given the information provided.

Question at position 33 A Martian probe brings back a soil sample that contains stretches of DNA that are similar to life on Earth. This evidence would support which hypothesis? Panspermia"RNA world"AbiogenesisNot enough informationClear my selection单项选择题

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Question at position 33 A Martian probe brings back a soil sample that contains stretches of DNA that are similar to life on Earth. This evidence would support which hypothesis? Panspermia"RNA world"AbiogenesisNot enough informationClear my selection单项选择题

类似问题

Match each of the following terms with their most accurate definition. 1: Phylogenetic tree ____ 2: Microbialite ____ 3: Miller-Urey experiment ____ 4: Last universal common ancestor ____ 5: Primordial soup ____ 6: Abiogenesis ____

The earliest fossil record is from

In OOL theory, evolution and selective pressure, can occur both on non-living (aboitic) and living (biotic) chemical systems.

Chemical evolution required about _____ years to form the first primitive biological self replicating cells.

CHOOSE THE BEST ANSWER Which of the following statements would support the abiogenesis hypothesis for the origin of life on Earth?

CHOOSE THE BEST ANSWER With regard to the origin of life on Earth, which of the following findings would support the hypothesis of abiogenesis, but not the panspermia hypothesis?

Question at position 22 Of the approaches listed below, which one is used to study the origin of life on Earth?PhylogeneticsComputer modelingComparative anatomyFossil analysisMolecular clocksClear my selection

更多留学生实用工具

希望你的学习变得更简单

Match each of the following terms with their most accurate definition. 1: Phylogenetic tree 2: Microbialite 3: Miller-Urey experiment 4: Last universal common ancestor 5: Primordial soup 6: Abiogenesis