Question 1

Which of the following best describes why animals are considered monophyletic?

Accepted Answer

They all originated from a common ancestor and share unique derived traits.

Question 2

Which of the following is a key difference between species richness and species evenness in measuring biodiversity?

Accepted Answer

Species richness quantifies the number of species in an area, while species evenness measures the relative abundance of each species.

Question 3

A researcher is comparing the total number of species across several different habitats in a region. Which measure of biodiversity is she using?

Accepted Answer

Gamma diversity

Question 4

Which of the following scenarios best illustrates an adaptive radiation?

Accepted Answer

A single ancestral bird species colonizes an island with many unoccupied ecological niches and rapidly diversifies into multiple new species, each adapted to a different food source.

Question 5

Which of the following is NOT a likely cause of a mass extinction event?

Accepted Answer

Gradual adaptation to new ecological niches

Question 6

Which of the following best defines a species' fundamental niche?

Accepted Answer

The full set of environmental conditions and resources a species could theoretically use

Question 7

A small population of frogs is isolated in a fragmented habitat. Which of the following is a likely consequence for this population?

Accepted Answer

Decreased genetic variation and increased risk of extinction due to inbreeding depression

Question 8

Which of the following conservation strategies directly addresses the problem of inbreeding depression in small populations?

Accepted Answer

Captive breeding and strategic release to increase gene flow

Question 9

Which of the following best describes phylogenetic diversity?

Accepted Answer

The amount of evolutionary history represented in a community, measured by the sum of branch lengths on a phylogenetic tree

Question 10

Which of the following is an example of a coevolutionary loop?

Accepted Answer

Flowering plants evolving traits to attract specific pollinators, which in turn evolve traits to better access the flowers

Question 11

If a community has 5 species with the following relative abundances: 40%, 30%, 15%, 10%, and 5%, which measure would best capture the distribution of individuals among species?

Accepted Answer

Species evenness

Question 12

Which of the following is a plausible outcome of a mass extinction event?

Accepted Answer

Opening of ecological niches, allowing surviving species to diversify and adapt

Question 13

Which of the following best explains why smaller populations are more vulnerable to extinction?

Accepted Answer

They are more susceptible to random events and genetic drift, leading to inbreeding and loss of genetic diversity.

Question 14

Which of the following is an example of a functional trait used to measure functional diversity in a community?

Accepted Answer

Leaf size in plants affecting photosynthetic rate

Question 15

Which of the following equations correctly represents the calculation for species evenness using the Shannon diversity index $$H'$$ and the maximum possible diversity $$H'_{max}$$?

Accepted Answer

$$E = \frac{H'}{H'_{max}}$$

Question 16

Which of the following best describes the realized niche of a species?

Accepted Answer

The actual conditions and resources a species uses in the presence of competitors and other biotic factors

Question 17

Which of the following is a direct human impact that leads to biodiversity loss?

Accepted Answer

Habitat fragmentation, which reduces population sizes and connectivity

Question 18

Which of the following best explains why gene flow is important for small populations?

Accepted Answer

It introduces new genetic variation, reducing the risks associated with inbreeding and genetic drift.

Question 19

Which of the following is an example of how evolutionary innovations can lead to increased biodiversity?

Accepted Answer

The evolution of flowers in plants, which allowed for new pollination strategies and diversification of both plants and pollinators

Question 20

Which of the following conservation actions would most likely increase the carrying capacity ($$K) of a $$population?

Accepted Answer

Restoring habitat quality and increasing available resources

Animal Diversity, Biodiversity, and Conservation Biology

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