Which of the following statements is correct about index fossils? O a. They are a group of vertebrates that have four limbs, and include mammals, amphibians, and some reptiles. b. They are the fossil remains of an organism that lived in a particular geologic age, used to determine the age o rocks in which they are found. O c. They are the first discovered fossils of groups that are still alive today (e.g. Archaeopteryx for birds). O d. They are fossils that represent the oldest known member of a clade. O e. They are often based on worms, jellyfish and other soft-bodied animals. Cleas
Which of the following statements is correct about index fossils? O a. They are a group of vertebrates that have four limbs, and include mammals, amphibians, and some reptiles. b. They are the fossil remains of an organism that lived in a particular geologic age, used to determine the age o rocks in which they are found. O c. They are the first discovered fossils of groups that are still alive today (e.g. Archaeopteryx for birds). O d. They are fossils that represent the oldest known member of a clade. O e. They are often based on worms, jellyfish and other soft-bodied animals. Cleas
Chapter10: Reconstitution Of Powdered Drugs
Section: Chapter Questions
Problem 1.5P
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![Which of the following statements is correct about index fossils?
a. They are a group of vertebrates that have four limbs, and include mammals, amphibians, and some reptiles.
b. They are the fossil remains of an organism that lived in a particular geologic age, used to determine the age of the
rocks in which they are found.
O c. They are the first discovered fossils of groups that are still alive today (e.g. Archaeopteryx for birds).
O d. They are fossils that represent the oldest known member of a clade.
O e. They are often based on worms, jellyfish and other soft-bodied animals.
Clear my choice](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5566d08a-ecb0-4380-b528-d74dd8aebbe8%2F3562b079-d7fa-418b-87fb-8e8c2ee7ce6b%2F90ycaxv_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Which of the following statements is correct about index fossils?
a. They are a group of vertebrates that have four limbs, and include mammals, amphibians, and some reptiles.
b. They are the fossil remains of an organism that lived in a particular geologic age, used to determine the age of the
rocks in which they are found.
O c. They are the first discovered fossils of groups that are still alive today (e.g. Archaeopteryx for birds).
O d. They are fossils that represent the oldest known member of a clade.
O e. They are often based on worms, jellyfish and other soft-bodied animals.
Clear my choice
![with 9 bands, each with a 'normal thickness' of agar at the base, with different amounts of an antibiotic added.
antibiotic added. The next band in contains enough antibiotic to kill the majority of the E. coli cells. Travelling fu
antibiotic concentration further increases up to 1000X lethal dose in the very centre. E. coli are placed at the ver
days, spread across its surface to the very centre. Before crossing each band, there is a short pause in growth.
What is the role of the antibiotic in this experiment?
a. The antibiotic controls for genetic drift
b. The antibiotic selects for the initial laboratory strain of E. coli
The antibiotic slows growth so the colony shape can be observed more easily
d. The antibiotic prevents contamination from the environment
e.
None of these answers is correct
Clear my choice](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5566d08a-ecb0-4380-b528-d74dd8aebbe8%2F3562b079-d7fa-418b-87fb-8e8c2ee7ce6b%2F3zcwf0j_processed.jpeg&w=3840&q=75)
Transcribed Image Text:with 9 bands, each with a 'normal thickness' of agar at the base, with different amounts of an antibiotic added.
antibiotic added. The next band in contains enough antibiotic to kill the majority of the E. coli cells. Travelling fu
antibiotic concentration further increases up to 1000X lethal dose in the very centre. E. coli are placed at the ver
days, spread across its surface to the very centre. Before crossing each band, there is a short pause in growth.
What is the role of the antibiotic in this experiment?
a. The antibiotic controls for genetic drift
b. The antibiotic selects for the initial laboratory strain of E. coli
The antibiotic slows growth so the colony shape can be observed more easily
d. The antibiotic prevents contamination from the environment
e.
None of these answers is correct
Clear my choice
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