BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 25, Problem 4A
During which tunes would you expect that geographic isolation would be particularly important in the evolution of life?
a. Cambrian period
b. End of the Paleozoic era
c. The beginning of the Cenozoic era
d. Both a and c are correct.
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The 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 extinction
Which 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.
In which type of rock are you most likely to find a fossil? a. basalt, a dark, fine-grained volcanic rock b. limestone, composed of sedimented calcium carbonate c. slate, a volcanically melted and cooled shale d. granite, which forms by crystallization of magma cooling below Earth’s surface
Chapter 25 Solutions
BIOLOGY
Ch. 25.1 - Describe the history of the Earth.Ch. 25.1 - Understand the relationship between geological...Ch. 25.2 - Contrast todays atmosphere with the likely...Ch. 25.2 - Prob. 2LOCh. 25.3 - Prob. 1LOCh. 25.4 - Prob. 1LOCh. 25.4 - Prob. 2LOCh. 25.5 - Compare and contrast the evolution of the...Ch. 25.5 - Discuss the types of cell specialization necessary...Ch. 25 - The Miller-Urey experiment demonstrated that a....
Ch. 25 - Plate tectonics can contribute to a. volcanoes and...Ch. 25 - Identify which of the following statements is...Ch. 25 - Which of the following events occurred first in...Ch. 25 - Fossil data indicate that a. life originated 4...Ch. 25 - A global glaciation would be unlikely to occur if...Ch. 25 - Although we do not know how early life arose, the...Ch. 25 - Which bits of evidence would convince you that...Ch. 25 - During which tunes would you expect that...Ch. 25 - The chloroplasts of brown algae a. have a...Ch. 25 - Vascular plants sequestered large amounts of CO2...Ch. 25 - Synthesizing what you have learned in this...Ch. 25 - Prob. 3S
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- How do fossils provide evidence that evolution has happened on Earth? a. Fossils show that some species have gone extinct. b. Fossils show how life forms present today are different than those from the past. Fossils show how the sizes of certain animals has changed drastically over millions of с. years. d. Different sedimentary rock layers provide evidence for how the environment has changed over time.arrow_forwardwhat key trait of life developed with the emergence of multicellular organism, the third threshold in the evolution of life? a. metabolism b. adaptation c. homeostasis d. reproductionarrow_forwardChoose the best below ? Which of these steps probably occurred first in the chemical andbiological evolution of life? a. The cell membrane of a protobiont formed.b. Formation of the first organic moleculesc. The genetic material was RNA.d. Simple organic monomers formed from inorganic materials.arrow_forward
- If the evolution of life was placed on a 24 hour clock, when did humans arrive? a. At the 30 minute mark. b. 1 minute into the beginning c. Less than 1 secong to do ( to the end) d. Right at the ver startarrow_forwardwhere on the earth did life mostly likely first emerge, where all the ingredients and conditions for life existed? a. volcanic islands b. deep oceanic vents c. tidal pools d. tropical rainforestarrow_forwardwhich statement about macroevolution is true? a. The history of life on Earth follows a general trend toward increasing diversity marked by rare mass extinction events. b. The theory of punctuated equilibrium proposes that most evolutionary changes occur over long periods of time. c. The theory of gradualism proposes that major evolutionary changes happen relatively rapidly and are then followed by long periods of little change. d. All scientific understandings are complete, as scientific investigations have now filled in all remaining gaps.arrow_forward
- Which sentence says true about evolutionary relationship of organisms? * a. DNA evidence shows that the giant pandas are more closely related to raccoons than bears. b. Scientist infer that the species with similar body structure and development patterns inherited many of the same genes from acommon ancestor.a c. Scientist never have to change their hypotheses about species relationships. d. Scientist can compare protein structure to determine how closely two species are related .arrow_forwardThe first forms of life on Earth were a. plants b. microorganisms c. birds d. dinosaursarrow_forwardWhat type of data is primarily used to determine the existence and appearance of early animal species? a. molecular data b. fossil data c. morphological data d. embryological development dataarrow_forward
- What's the largest unit of geologic time, lasting hundreds of millions of years? A. Era B. EonC. Epoch D. Periodarrow_forwardThe map below shows how the continents once were connected together (link to bigger map if you need it (Links to an external site.)). Based on the map and biogeography, where would we expect to find animals and fossils that were closely related to animals from Brazil? A. Nigeria B. Russia C. Canada D. Indiaarrow_forwardScientists find an artifact next to an index fossil. What can they conclude about the unknown age of the artifact? a The artifact is older than the index fossil. b The artifact is younger than the index fossil. c The artifact is approximately the same age as the index fossil. d The artifact's age is not related to that of the index fossil.arrow_forward
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