Discuss the development of reptiles from amphibians. What changes were necessary to allow reptiles to remain on
land all the time? Why did this change allow access to many new environments for the reptiles to occupy? What will be an ideal response?
The most important change was the development of the amniote egg. This egg allowed
reptiles to reproduce on land without needing to return to the water. Hence, reptiles were not
required to remain close to water bodies and could inhabit a variety of new inland
environments
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A rock sample containing an isotope with a half-life of 28 million years has an initial mass of 184 grams. How much
time has elapsed after three half-lives? a. 6.5 million years b. 9.3 million years c. 32 million years d. 56 million years e. 84 million years
An area distinguished by a unique combination of features is a(n)
A) biome. B) landscape. C) region. D) uniform unit. E) ecosystem.
What is meant by the term keynote species? Explain why it is important to issues of biodiversity and extinction
What will be an ideal response?
The fraction of the total radiation encountered that is reflected by a surface is called its ________
Fill in the blank(s) with correct word