concepts 2 lecture final

What is the term used to describe the broader scale of evolutionary changes over time? It gives rise to new species and higher taxonomic groups with widely divergent characteristics.

• genetic drift

• microevolution

• macroevolution

• directional selection

What is the term used to describe the change in a population’s gene pool over a succession of generations? It is the slow, gradual change of a species over time.

• genetic drift

• microevolution

• macroevolution

• directional selection

________ studies the diversity of populations at the level of the gene. It is also the study of how selective forces change the allele frequencies in a population over time.

• Adaptation

• Population genetics

• Natural selection

• Hardy-Weinberg equilibrium

The theory of ________ states that offspring with inherited characteristics that allow them to compete for limited resources will survive and have more offspring than those individuals with variations that are less able to compete. It is also known as “the survival of the fittest.”

• Adaptation

• Speciation

• Natural selection

• Hardy-Weinberg equilibrium

Which of the following domains contains organisms with a membrane-bound nucleus and organelles?

• Bacteria

• Eukarya

• Archaea

Many molluscs (phylum Mollusca) look very different from each other, and yet we can tell they are related and in the same phylum because they all _______.

• have a mantle

• have a visceral mass

• have a foot

• all of the above

Which of the following organisms are humans (Homo sapiens) most closely related to genetically?

• Proteobacteria

• Fungi

• Halophiles

• Microsporidia

Which phylum is characterized by adaptations such as jointed appendages, segmentation, the ability to molt, a variety of respiratory organs, and a well-developed nervous system? Insects are included in this phylum.

• molluscs (Mollusca)

• echinoderms (Echinodermata)

• chordates (Chordata)

• arthropods (Arthropoda)

When one original species evolves into two new species, this evolution is called ________.

• genetic adoption

• adaptation

• genetic drift

• speciation

Coelomates that develop with the anus developing first, and then the mouth developing second, are called ________. Chordates (such as humans) and echinoderms fit into this category.

• A. gastrocoelomate

• B. blastocoelomate

• C. protostomes

• D. deuterostomes