Biodiversity Knowledge-Based Download PDF

Questions

1. 1.

   Which of the following patterns best describes the global distribution of terrestrial species richness known as the latitudinal diversity gradient?

   • A) Species richness is highest in the tropics and systematically decreases toward higher latitudes.
   • B) Species richness peaks in mid-latitude temperate zones and declines sharply at the equator.
   • C) Species richness increases progressively from equatorial regions toward both geographic poles.
   • D) Species richness remains essentially uniform across latitudes because biomes adapt to their local climates.
2. 2.

   Which of the following criteria must a geographic region meet to be designated as a global biodiversity hotspot?

   • A) It must possess the highest overall biomass in its biome and contain entirely undisturbed primary climax forest.
   • B) It must host exclusively apex predators and demonstrate zero recorded species extinctions over the past century.
   • C) It must support representative species from every known animal phylum and maintain a strictly stable human population.
   • D) It must contain at least 1,500 species of endemic vascular plants and have lost at least 70% of its original primary native vegetation.
3. 3.

   Which of the following statements best describes ecosystem diversity as a fundamental level of biodiversity?

   • A) The variety of different habitats, biological communities, and ecological processes occurring across a region
   • B) The total range of distinct alleles and heritable traits present within a single interbreeding population
   • C) The absolute count of different taxonomic species that inhabit a specific localized habitat
   • D) The relative abundance and uniform numerical distribution of individual organisms among coexisting species
4. 4.

   Which of the following statements accurately describes species evenness within an ecological community?

   • A) The total number of different biological species inhabiting a defined geographic area.
   • B) The spatial arrangement and physical distribution of organism populations across different habitat strata.
   • C) The relative abundance and proportional representation of individuals belonging to each species in the community.
   • D) The rate at which autotrophic organisms generate organic biomass across different trophic levels.
5. 5.

   Which of the following statements best explains how high genetic diversity contributes to the long-term survival and resilience of a biological population?

   • A) It ensures that all individuals within the population express identical morphological traits and environmental tolerances.
   • B) It prevents spontaneous mutations and eliminates deleterious recessive alleles from the collective gene pool.
   • C) It enables individuals to reproduce exclusively through asexual cloning during periods of severe ecological disturbance.
   • D) It provides a wide range of phenotypic traits, increasing the probability that some individuals will survive environmental changes.