How Evolution Works - Discover Biology | Biology+

Course

Introductory Biology

Study Pack

Set 1: The Nature of Science and the Characteristics of Life

Set 2: Biological Diversity, Bacteria, and Archaea

Set 3: Protista, Plantae, and Fungi

Set 4: Animalia

Set 5: The Chemistry of Life

Set 6: Cell Structure and Internal Compartments

Set 7: Cell Membranes, Transport, and Communication

Set 8: Energy, Metabolism, and Enzymes

Set 9: Photosynthesis and Cellular Respiration

Set 10: Cell Division

Set 11: Stem Cells, Cancer, and Human Health

Set 12: Patterns of Inheritance

Set 13: Chromosomes and Human Genetics

Set 14: Dna and Genes

Set 15: From Gene to Protein

Set 16: Dna Technology

Set 17: How Evolution Works

Set 18: Evolution of Populations

Set 19: Speciation and the Origins of Biological Diversity

Set 20: The Evolutionary History of Life

Set 21: The Biosphere

Set 22: Growth of Populations

Set 23: Ecological Communities

Set 24: Ecosystems

Set 25: Global Change

Set 26: Internal Organization and Homeostasis

Set 27: Nutrition and Digestion

Set 28: Circulation and Gas Exchange

Set 29: Animal Hormones

Set 30: Nervous and Sensory Systems

Set 31: Skeletons, Muscles, and Movement

Set 32: Defenses Against Disease

Set 33: Reproduction and Development

Set 34: Animal Behavior

Set 35: Plant Structure, Nutrition, and Transport

Set 36: Plant Growth and Reproduction

Set 17 How Evolution Works

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Set 17 How Evolution Works

(Multiple Choice)

Free

Peppered moths are generally light in color and blend into the trunks of the trees they live on. Populations of peppered moths found in areas where soot has blackened the tree trunks are dark in color. This example demonstrates

A)artificial selection.
B)natural selection.
C)genetic drift.
D)vestigial coloration.

Answer

(Multiple Choice)

Free

Certain weeds have become resistant to the pesticides that were used to kill them. Which of the following statements is the best explanation for this phenomenon?

A)The weeds have become different species.
B)The pesticides evolved so that they are no longer useful against the weeds.
C)Continental drift caused the evolution of weed resistance in the pesticides.
D)Natural selection acted on the genetic variability present in the weeds' genomes.

Answer

(Multiple Choice)

Free

Which of the following processes does not contribute to the generation of genetic variation within a population?

A)independent assortment
B)crossing-over
C)segregation of alleles
D)random fusion of sperm and egg

Answer