Scientists find a fossil (Fossil A) in a deep layer of sedimentary rock. They determine that
Fossil A is the remains of a species never seen before. A few years later, other scientists
discover a similar fossil (Fossil B) in a layer of sedimentary rock closer to Earth's surface.
Fossil A and Fossil B share some characteristics, but it is determined that they are not closely
related and that Fossil B is a different species. One hundred years later, scientists discover
another similar fossil (Fossil C) in a layer of sedimentary rock between those in which Fossils
A and B were found. Upon cxamining all three fossils, scientists reach the conclusion that all
three fossils represent the same species. They determine that Fossil B (found in the shallowest
rock layer) evolved from Fossil C (found in an intermediary layer), which evolved from Fossil
A (found in the deepest rock layer). Which statement BEST describes this scenario?
Very little can be learned about the evolution of a species by examining the fossil
record.
Early fossil researchers did not understand the information provided by the fossil
record.
The fossil record provides trace evidence for the long history of changing life forms.
Theories about the fossil record do not change based on finding new evidence
Answers: 2
Biology, 22.06.2019 00:10, Tayler9353
The production of cells during mitosis into specialized function is recombination or differentiation
Answers: 1
Biology, 22.06.2019 08:00, photagraphykid
Which set of terms best describes a community of miners who live out in the countryside of west virginia and use specialized geological equipment to analyze the composition of rock?
Answers: 1
Biology, 22.06.2019 13:20, abolton04
Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.
Answers: 1
Biology, 22.06.2019 13:50, jahootey3042
The largest unit within which gene flow can readily occur is a
Answers: 3
Scientists find a fossil (Fossil A) in a deep layer of sedimentary rock. They determine that
Fossil...
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