BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 25, Problem 3A
Which 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.
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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.
what is a mold? A. the imprints from an organism can be a shell or the skin of an animal B. Molds fill in with sediment that hardens into rock. C. naturally preserved remains D. Organisms preserved in materials such as amber
Which statement about spontaneous generation is false?
A.
It addresses the formation of living cells from previously nonliving material.
B.
This was a common belief for during the Middle Ages.
C.
Pasteur demonstrated that it does not occur under normal laboratory conditions.
D.
It occurs every time a new species evolves from a preexisting species.
E.
It apparently occurred at least once – when life on Earth began.
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
- 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 surfacearrow_forwardWhich phylogenetic model proposes that all three domains of life evolved from a pool of primitive prokaryotes? a. tree of life b. web of life c. ring of life d. network modelarrow_forwardWhich is a piece of evidence that supports the endosymbiotic theory? Select all that apply. (Group of answer choices) A. many bacteria are resistant to antibiotics B. eukaryotic cells have cell membranes C. mitochondria have their own DNA D. chloroplast DNA is more similar to cyanobacteria DNA than eukaryotic DNA E. ribosomes are present in eukaryotic cells F. mitochondria must divide to multiply, cells can't build themarrow_forward
- What is the term for bits of rock and dirt? O A. Mesozoic O B. Half-life O c. Sediment O D. Radiometricarrow_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_forwardCompare the different structures in the photo. What do scientists infer from the similarities between these structures? Describe how DNA evidence might be used to confirm scientists' conclusions about any relationship between these organisms.arrow_forward
- What event is thought to have contributed to the evolution of eukaryotes? a. global warming b. glaciation c. volcanic activity d. oxygenation of the atmospherearrow_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_forwardOn a phylogenetic tree, which term refers to lineages that diverged from the same place? a. sister taxa b. basal taxa c. rooted taxa d. dichotomous taxaarrow_forward
- Which choice correctly shows the relative amounts of non-coding DNA? A. A human has a greater relative amount of non-coding DNA than an elephant. B. An elephant has a greater relative amount of non-coding DNA than a fruit fly. C. A fruit fly has a greater relative amount of non-coding DNA than a bacterium. D. A bacterium has a greater relative amount of non-coding DNA than an archaean,arrow_forwardWhy can’t scientists just do DNA analysis on these fossil hominins to determine if they are a separate species and possibly what species they belong to? A. The DNA of fossil hominins is too similar to modern humans, making it difficult to distinguish between them. B. The technology for extracting DNA from fossils hasn't been developed yet. C. The fossils would need to be in a -5 degree Celsius environment to prevent DNA from degrading D. Scientists can't perform DNA analysis on fossil hominins because the fossils have been contaminated with modern human DNA over the years, making it impossible to isolate the ancient genetic material.arrow_forwardWhich of the following is an accurate point that supports the idea that the earliest protocells relied first on RNA (not DNA) as inherited information? A. RNA is composed of lipids, and lipids were present on early Earth before the nucleotides that compose DNA were B. RNA is a monomer (unlike DNA), so it is simpler and more likely to have been used by these simple protocells C. DNA would have been too large to fit into the small protocells, but RNA was small enough to fit D. RNA can serve dual roles as both genetic information storage and an enzyme (but DNA cannot do both) ..arrow_forward
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