EBK BIOLOGY: CONCEPTS AND APPLICATIONS
9th Edition
ISBN: 8220100477805
Author: STARR
Publisher: CENGAGE L
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Chapter 16, Problem 5SQ
Summary Introduction
Introduction:
Fossils are the remaining portions of the organism like animals or plants from the ancient period. The fossils are formed under “extreme pressure” and a long period of time.
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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
What is the term for bits of rock and dirt?
O A. Mesozoic
O B. Half-life
O c. Sediment
O D. Radiometric
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.
Chapter 16 Solutions
EBK BIOLOGY: CONCEPTS AND APPLICATIONS
Ch. 16 - The number of species on an island usually depends...Ch. 16 - The bones of a birds wing are similar to the bones...Ch. 16 - Prob. 3SQCh. 16 - A trait is adaptive if it _______. a. arises by...Ch. 16 - Prob. 5SQCh. 16 - If the half-life of a radioisotope is 20,000...Ch. 16 - Did Pangea or Gondwana form first?Ch. 16 - Prob. 8SQCh. 16 - Prob. 9SQCh. 16 - Prob. 10SQ
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- Which mechanism of fossil formation created a replica of an organism's original form? a natural cast b amber-preserved c permineralization d trace fossilarrow_forwardBecause it's most resistant to deterioration, which type of molecule is most often found in molecular fossils? A. Lipid molecules B. DNÀ molecules C. Protein molecules D. RNA moleculesarrow_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
- which term describes any ancient remains, impressions, or traces of an organism or traces of its activity that have been preserved in rocks or other mineral deposits in Earth’s crust? a. analogous feature b. homologous feature c. mutation d. fossilarrow_forward1. Fossils are remains of ancient organisms found in the rocks are categorized depending on their age. How do researchers determine the fossil’s actual age? a. absolute dating b. relative dating c. structural dating d. precise age datin 2.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
- The first forms of life on Earth were a. plants b. microorganisms c. birds d. dinosaursarrow_forwardAbout when did the common ancestor of chimpanzees, humans, gorillas, and orangutans last exist? a. Between 5 and 8 million years ago b. Less than 5 million years ago c. More than 15 million years ago d. Between 10 and 15 million years ago e. Between 8 and 10 million years agoarrow_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
- According to "Homo erectus – The First Humans”, how old is the oldest Homo erectus fossil (that scientists agree upon) and where was it located? A.1.9 million years old in Kenya B.2 million years old in South Africa C.3 million years old in China D.5 million years old in Kenyaarrow_forwardWhat is used to determine phylogeny? a. mutations b. DNA c. evolutionary history d. organisms on eartharrow_forwardWhich branchpoint represents the most recent common ancestor of A and C? C 2 4 -A -B 3arrow_forward
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