Question

chapter 4: biodiversity and evolution

• biodiversity: the ____________ of life on earth

types of cells

• prokaryotic cells:
• examples: ____________
• characteristics: ____________
• eukaryotic cells:
• examples: ____________
• characteristics: ____________

species definition

• a species is a group that:

1. has similar ____________
2. can produce ____________ offspring

levels of biodiversity

1. species diversity

• species richness: ____________
• species evenness: ____________

1. genetic diversity: ____________
2. ecosystem diversity: ____________

ecosystem roles

• native species: ____________
• non - native species: ____________
• indicator species: ____________
• characteristics: ____________
• keystone species: ____________
• example: ____________

evolution and natural selection

• proposed by: ____________ in the mid - 1800s

key concepts

• mutation: ____________
• natural selection:

1. traits must be ____________
2. traits must provide ____________ advantage
3. traits must be ____________ to offspring

limits of evolution
common myths:

1. survival of the ____________

Explanation:

Biodiversity refers to the variety of life on Earth. Prokaryotic cells like bacteria lack a nucleus. Eukaryotic cells such as plant and animal cells have a nucleus. A species has similar characteristics and can produce fertile offspring. Species richness is the number of different species, species evenness is the relative abundance of species. Genetic diversity is variation within a species' genes, ecosystem diversity is the variety of ecosystems. Native species are naturally occurring, non - native are introduced. Indicator species give clues about environmental health, keystone species have a large impact on the ecosystem. Evolution by natural selection was proposed by Charles Darwin. A mutation is a change in DNA. For natural selection, traits must be variable, provide a survival or reproductive advantage, and be heritable. The "survival of the fittest" is a common myth in evolution.

Answer:

• Biodiversity: Variety
• Prokaryotic Cells - Examples: Bacteria
• Prokaryotic Cells - Characteristics: Lack a nucleus
• Eukaryotic Cells - Examples: Plant cells, animal cells
• Eukaryotic Cells - Characteristics: Have a nucleus
• Species Definition - 1: Characteristics
• Species Definition - 2: Fertile
• Species Richness: The number of different species
• Species Evenness: The relative abundance of species
• Genetic Diversity: Variation within a species' genes
• Ecosystem Diversity: The variety of ecosystems
• Native Species: Naturally occurring in an ecosystem
• Non - Native Species: Introduced to an ecosystem
• Indicator Species: Give clues about the environmental health of an ecosystem
• Indicator Species - Characteristics: Sensitive to environmental changes
• Keystone Species: A species that has a disproportionately large impact on its environment relative to its abundance
• Keystone Species - Example: Sea otters (many possible examples)
• Evolution and Natural Selection - Proposed by: Charles Darwin
• Mutation: A change in the DNA sequence
• Natural Selection - 1: Variable
• Natural Selection - 2: Survival or reproductive
• Natural Selection - 3: Heritable
• Limits of Evolution - Common Myths - 1: Fittest