Reptiles and all later vertebrates share what feature?

Question

BlackTom AI · Accepted Answer

Question restatement: Reptiles and all later vertebrates share what feature?

Option a: Reproduction via the amniotic egg. This is a key evolutionary trait that distinguishes reptiles and all crown groups that descended from amniotes, allowing embryo development within an amniotic sac with membranes, independent of water for terrestrial environments. This trait is shared among reptiles, birds, and mammals as a unifying characteristic of amniotes.

Option b: The ability to stand on two legs. While some reptiles (and other vertebrates) may occasionally stand bipedally, this is not a shared, defining feature across reptiles and later vertebrates as a whole. Many reptiles are quadrupedal, and bipedalism is not a universal trait of the group.

Option c: Warm bloodedness. Endothermy (warm-bloodedness) is not present across reptiles and later vertebrates as a whole. It is characteristic of birds and mammals, but not of the broader reptile lineage or all later vertebrates, making this option inaccurate as a general shared feature.

Option d: The ability to fly. Flight is limited to a subset of reptiles (through aves, i.e., birds, which are a specialized group) and is not a universal trait among reptiles and later vertebrates. Many reptiles are flightless or do not fly at all, so this cannot be the shared feature.

Reasoning synthesis: The amniotic egg represents a fundamental, shared evolutionary advance that enables terrestrial development and is retained across all amniotes (reptiles, birds, and mammals). The other options describe traits that are not universal to reptiles and all later vertebrates, either because they are absent in many members of the group or are restricted to specific subgroups. Therefore, the most accurate shared feature among reptiles and all later vertebrates is reproduction via the amniotic egg.

Reptiles and all later vertebrates share what feature?Single choice

Similar Questions

Which of the below is a feature shared between mammals and dinosaurs but not with amphibians or fish?

What is the feature that is common among terrestrial vertebrates but not in more basal vertebrates?

Why was the advent of the amniotic egg so important in the evolution of terrestrial vertebrates?

Which of the following is a key advantage of the amniotic egg that supported the transition of vertebrates from aquatic to terrestrial environments?

Reptiles and all later vertebrates share what feature?

Reptiles and all later vertebrates share what feature?

Which ONE of the following thalamic nuclei is targeted by the trigeminothalamic tract?

More Practical Tools for Students Powered by AI Study Helper

Homework AI Solver

Stylized AI Paper Writer

Plagiarism Checker Assistant

Citation AI Academic Writing Tool

In-Class Translation Assistant

AI Note Generator

AI Quiz Answers

Past Exam Questions from University Test Bank

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler