BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 28, Problem 1U
Fossil evidence of eukaryotes dates back to
a. 2.5 BYA.
b. 1.5 BYA.
c. 2.5 MYA.
d. 1.5 MYA.
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Fossilized stromatolites(A) formed around deep-sea vents.(B) resemble structures formed by bacterial communities that are found today in some shallowmarine bays.(C) provide evidence that plants moved onto landin the company of fungi around 500 million years ago.(D) contain the first undisputed fossils of eukaryotes.
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Chapter 28 Solutions
BIOLOGY
Ch. 28.1 - Prob. 1LOCh. 28.1 - Define endosymbiosis and explain how it relates to...Ch. 28.1 - Describe how mitosis in fungi and some protists...Ch. 28.2 - Describe how an organism would be classified as a...Ch. 28.2 - Prob. 2LOCh. 28.2 - Prob. 3LOCh. 28.3 - List the main features of diplomonads and...Ch. 28.3 - Prob. 2LOCh. 28.3 - Prob. 3LOCh. 28.3 - Prob. 4LO
Ch. 28.4 - Identify the distinguishing feature of the members...Ch. 28.4 - Prob. 2LOCh. 28.4 - Prob. 3LOCh. 28.4 - Prob. 4LOCh. 28.5 - Prob. 1LOCh. 28.5 - Distinguish between cellular and plasmodial slime...Ch. 28.6 - Prob. 1LOCh. 28.6 - Describe how humans use red algae.Ch. 28.6 - Explain why charophytes are considered the closest...Ch. 28.7 - Prob. 1LOCh. 28.7 - Prob. 2LOCh. 28.8 - Prob. 1LOCh. 28 - Prob. 1DACh. 28 - Prob. 1IQCh. 28 - Prob. 2IQCh. 28 - Fossil evidence of eukaryotes dates back to a. 2.5...Ch. 28 - DNA is not found in this organelle. a. Endoplasmic...Ch. 28 - Prob. 3UCh. 28 - Both diplomonads and parabasalids a. contain...Ch. 28 - Trypanosomes are examples of a. euglenoids. b....Ch. 28 - Prob. 6UCh. 28 - If a cell contains a pellicle, it a. can change...Ch. 28 - Strainenopila are a. tiny flagella. b. large...Ch. 28 - Choose all of the following that exlubit an...Ch. 28 - Choose all of the following that are...Ch. 28 - Prob. 11UCh. 28 - When food is scarce, cells of this organism...Ch. 28 - Analyze the following statement; and chose the one...Ch. 28 - Determine which feature of the choanoflagellates...Ch. 28 - Examine the life cycle of cellular slime molds,...Ch. 28 - Modem taxooomic treatments rely heavily on...Ch. 28 - Prob. 2SCh. 28 - Design an experiment to demonstrate that cells of...
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- The term “Cambrian explosion” refers to (a) an increase in biodiversity. (b) a mass extinction. (c) an atmospheric detonation due to increasing gas concentrations. (d) an oceanic eruption caused by underwater volcanic activity.arrow_forwardDuring the Precambrian, _______. a. atmospheric oxygen concentration declined b. bacteria, archaea, and early eukaryotes arose c. dinosaurs became extinct d. all of the abovearrow_forwardWhich of the following was not present by the end of Precambrian? a. archaea c. fungi b. bacteria d. fisharrow_forward
- The genus Homo dates back to about____. a. 3.9 million years ago b. 1.8 million years ago c. 250,000 years ago d. 2.8 million years agoarrow_forwardThe fossil record provides evidence for: A.When organisms lived on earth B. How some species have gone extinct C.How species evolved D. All of the abovearrow_forwardWhich bits of evidence would convince you that life originated as early as 3.2 bya? a. You look at a microfossil under a scanning electron microscope and it is the same shape as a cell. b. A high-quality transmission electron micrograph of a fossil cell reveals cellular compartments, including a possible nucleus. c. Potassium dating of a fossil containing a possible cell indicates that the fossil is 3.2 billion years old. d. Using transmission and scanning electron microscopy, you find evidence of a carbon-based material in what appears to be a cell wall of a fossil isotopically dated as 3.2 billion years old.arrow_forward
- How do we know how old a fossil is? A) We compare it to current species and see how much has changed B) We see how much soil is on top of it C) We use radiometric datingarrow_forwardThe Cambrian Explosion occurred approximately 542 million years ago. During the Cambrian, what ‘exploded’? a. The diversity of species on Earth, including many major animal phyla that exist today b. The Yucatan Peninsula, which was hit by an asteroid c. The quantity of oxygen in the atmosphere due to the expansion of coniferous forests d. Numerous volcanoes worldwide, leading to the fourth mass extinctionarrow_forwardWhich of these steps probably occurred first in the chemical andbiological evolution of life?a. The cell membrane of a protobiont formed.b. The first organic molecules formed.c. The original genetic material was RNA.d. Simple organic monomers formed from inorganic materials.arrow_forward
- A)Summarize the steps of endosymbiosis in eukaryotic evolution. B)Explain the evidences of endosymbiosis. C) Explain secondary endosymbiosis.arrow_forwardThe endosymbiotic theory explains the:a. origin of the first prokaryotic cells.b. origins of mitochondria and chloroplasts in eukaryotes.c. evolutionary relationship between animals, plants, and fungi.d. method of reproduction in protists.arrow_forwardPenguins are flightless birds, however, they still have wings. This is an example of a (the) _______. A) Convergent Evolution B) Developmental homology C) HomoplasyD) Law of SuccessionE) Vestigial structure Then explain why the answer is correct and the others are notarrow_forward
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