Bio - Unit 1, Chapter5, Lessons 1 & 2

What is the term for the gradual process of a species becoming extinct?

• Mass extinction

• Background extinction

• Sudden extinction

• Catastrophic extinction

Which of the following best describes background extinction?

• Rapid loss of multiple species

• Gradual process of a species becoming extinct

• Extinction due to a catastrophic event

• Extinction of all species at once

What does the term "biodiversity" refer to?

• The variety of life in the world or in a particular habitat or ecosystem.

• The study of living organisms.

• The process of photosynthesis in plants.

• The migration patterns of birds.

What is biological magnification?

• Decrease in concentration of a substance in organisms at higher trophic levels

• Increase in concentration of a harmful substance in organisms at higher trophic levels

• Equal distribution of substances across all trophic levels

• Elimination of harmful substances in a food chain

What does ecosystem diversity refer to?

• Variety of species in a specific area

• Variety of habitats, living communities, and ecological processes in the living world

• Genetic variation within a species

• Number of individual organisms in an ecosystem

What is the term for any different environmental condition occurring along an ecosystem's boundaries?

• Edge effect

• Core effect

• Boundary effect

• Transition effect

What is eutrophication?

• A process where nutrients are depleted from a body of water.

• A process by which nutrients, particularly phosphorus and nitrogen, become highly concentrated in a body of water, leading to increased growth of organisms such as algae or cyanobacteria.

• A process where water bodies become more acidic.

• A process where water bodies freeze over due to low temperatures.

What does the term "extinction" describe?

• A species that is thriving

• A species that is endangered

• A species that no longer has any known living individuals

• A species that is migrating

What is genetic diversity?

• A measure of the genetic variation among individuals in a population

• The number of species in a habitat

• The physical differences between organisms

• The similarity of genetic material in a species

Which of the following is an example of selection for terminal buds in Brassica oleracea?

• Cabbage

• Kale

• Broccoli

• Cauliflower