Question 1

Which does not result from a scientific investigation?

Accepted Answer

A)  Refinement of the experimental design 
B)  Formulation of new questions that result in additional experimentation 
C)  Use of statistical tests to evaluate the significance of the results 
D)  Experiments repeated and verified by others 
E)  A conclusion based on the investigator's opinion 
A)  Refinement of the experimental design 
B)  Formulation of new questions that result in additional experimentation 
C)  Use of statistical tests to evaluate the significance of the results 
D)  Experiments repeated and verified by others 
E)  A conclusion based on the investigator's opinion

Question 2

Scientists have been able to show that organisms as different as fruit flies and dogs share a majority of their genes.In these investigations, scientists compare the DNA of two or more organisms by looking for similarities in nucleotide _______.

Accepted Answer

The answer of Scientists have been able to show that...

Question 3

A group of individuals of the same species that interact is called a population, a group of populations of different species that live and interact in the same area make up a community, and communities together with the nonliving environment constitute a(n) _______.

Accepted Answer

The answer of A group of individuals of the same...

Question 4

You propose a set of experiments to test whether present-day chloroplasts originated from a single or multiple endosymbiotic events.Which experimental approach would provide the most detailed test of these hypotheses?

Accepted Answer

A)  Testing whether different groups of photosynthetic organisms have similar pigments in their chloroplasts 
B)  Testing whether the chloroplasts of different groups of photosynthetic organisms have the same structure 
C)  Performing an instrumental test to determine whether the wavelengths of light absorption by chloroplast pigments are the same in different groups of photosynthetic organisms 
D)  Using structural chemistry to test whether the light-absorbing pigments in different groups of photosynthetic organisms are the same 
E)  Comparing the genomes of chloroplasts found in different groups of photosynthetic organisms to determine their evolutionary relationship to one another as well as to free-living species 
A)  Testing whether different groups of photosynthetic organisms have similar pigments in their chloroplasts 
B)  Testing whether the chloroplasts of different groups of photosynthetic organisms have the same structure 
C)  Performing an instrumental test to determine whether the wavelengths of light absorption by chloroplast pigments are the same in different groups of photosynthetic organisms 
D)  Using structural chemistry to test whether the light-absorbing pigments in different groups of photosynthetic organisms are the same 
E)  Comparing the genomes of chloroplasts found in different groups of photosynthetic organisms to determine their evolutionary relationship to one another as well as to free-living species

Question 5

Refer to the figure below showing life's "timeline."   
Based on the timeline, which statement is true?

Accepted Answer

A)  The oldest fossils include photosynthesizers. 
B)  The first photosynthesizers were prokaryotic. 
C)  Multicellularity arose before the evolution of eukaryotic cells. 
D)  The oldest fossils include multicellular organisms. 
E)  The first photosynthesizers were multicellular. 
A)  The oldest fossils include photosynthesizers. 
B)  The first photosynthesizers were prokaryotic. 
C)  Multicellularity arose before the evolution of eukaryotic cells. 
D)  The oldest fossils include multicellular organisms. 
E)  The first photosynthesizers were multicellular.

Question 6

A key point in Darwin's explanation of evolution is that

Accepted Answer

A)  the biological structures most likely to be inherited are those that have become best suited to the environment through constant use. 
B)  all mutations that occur are those that will help future generations fit more successfully into their environments. 
C)  any trait that confers even a small increase in the probability that its possessor will survive and reproduce will be favored and will spread through the population. 
D)  genes change to help organisms cope with problems encountered within their environments. 
E)  extinction is nature's way of weeding out undeserving organisms. 
A)  the biological structures most likely to be inherited are those that have become best suited to the environment through constant use. 
B)  all mutations that occur are those that will help future generations fit more successfully into their environments. 
C)  any trait that confers even a small increase in the probability that its possessor will survive and reproduce will be favored and will spread through the population. 
D)  genes change to help organisms cope with problems encountered within their environments. 
E)  extinction is nature's way of weeding out undeserving organisms.

Exam 1: Studying Life

Which does not result from a scientific investigation?

Scientists have been able to show that organisms as different as fruit flies and dogs share a majority of their genes.In these investigations, scientists compare the DNA of two or more organisms by looking for similarities in nucleotide _______.

A group of individuals of the same species that interact is called a population, a group of populations of different species that live and interact in the same area make up a community, and communities together with the nonliving environment constitute a(n) _______.

You propose a set of experiments to test whether present-day chloroplasts originated from a single or multiple endosymbiotic events.Which experimental approach would provide the most detailed test of these hypotheses?

Refer to the figure below showing life's "timeline." Based on the timeline, which statement is true?

A key point in Darwin's explanation of evolution is that

Small Molecules and the Chemistry of Life

Proteins, Carbohydrates, and Lipids

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

Cell Membranes

Cell Communication and Multicellularity

Energy, Enzymes, and Metabolism

Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

Dna and Its Role in Heredity

From Dna to Protein: Gene Expression

Gene Mutation and Molecular Medicine

Regulation of Gene Expression

Genomes

Recombinant Dna and Biotechnology

Mechanisms of Evolution

Reconstructing and Using Phylogenies

Speciation

Evolution of Genes and Genomes

The History of Life on Earth

Bacteria, Archaea, and Viruses

The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

The Evolution and Diversity of Fungi

Animal Origins and the Evolution of Body Plans

Protostome Animals

Deuterostome Animals

The Plant Body

Transport in Plants

Plant Nutrition

Regulation of Plant Growth

Reproduction in Flowering Plants

Plant Responses to Environmental Challenges

Physiology, Homeostasis, and Temperature Regulation

Animal Hormones

Immunology: Animal Defense Systems

Animal Reproduction

Animal Development

Neurons, Glia, and Nervous Systems

Sensory Systems

The Mammalian Nervous System: Structure and Higher Functions

Musculoskeletal Systems

Gas Exchange

Circulatory Systems

Nutrition, Digestion, and Absorption

Salt and Water Balance and Nitrogen Excretion

Animal Behavior

The Physical Environment and Biogeography of Life

Populations

Species Interactions

Communities

Ecosystems

A Changing Biosphere

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