Question 1

Which of the following is a synapomorphy that unites all fungi within the tree of life?

Accepted Answer

Presence of chitin in cell walls

Question 2

Fungi play a crucial ecological role as decomposers. Which of the following best explains how their morphology supports this function?

Accepted Answer

Their hyphal networks increase surface area for absorption of nutrients from decaying matter.

Question 3

Which of the following best describes the generalized fungal life cycle?

Accepted Answer

Alternation between haploid and diploid stages, with spores produced by meiosis.

Question 4

Which of the following is a shared trait (synapomorphy) that unites all animals?

Accepted Answer

Presence of collagen in the extracellular matrix

Question 5

During the Cambrian explosion, which of the following major evolutionary innovations occurred in animals?

Accepted Answer

Development of bilateral symmetry and complex body plans

Question 6

Which of the following best describes the difference between proximate and ultimate explanations for animal behavior?

Accepted Answer

Proximate explanations focus on immediate mechanisms, while ultimate explanations address evolutionary reasons.

Question 7

A bird species exhibits two types of foraging behavior: one that maximizes energy intake per unit time and another that minimizes predation risk. Which concept from behavioral ecology best explains this trade-off?

Accepted Answer

Optimal foraging theory

Question 8

Which of the following is an example of a density-dependent factor regulating population size?

Accepted Answer

Spread of infectious disease

Question 9

Given the logistic growth equation $$dN/dt = rN \left(1 - \frac{N}{K}\right)$$, what happens to the population growth rate as $$N$$ approaches $$K$$?

Accepted Answer

The growth rate approaches zero

Question 10

Which of the following best describes the difference between fundamental and realized niches?

Accepted Answer

The fundamental niche is the full range of conditions a species can tolerate, while the realized niche is where it actually exists due to competition.

Question 11

In a food web, which of the following best illustrates a keystone species?

Accepted Answer

A sea otter whose removal leads to a dramatic increase in sea urchin populations and decline in kelp forests

Question 12

Which of the following is a characteristic of K-selected species?

Accepted Answer

Produce few offspring with high parental investment

Question 13

Which of the following is a primary abiotic factor that determines the distribution of terrestrial biomes?

Accepted Answer

Average annual temperature and precipitation

Question 14

Which of the following best describes net primary productivity (NPP) in an ecosystem?

Accepted Answer

NPP = GPP - R, where GPP is gross primary productivity and R is respiration

Question 15

Which of the following is a major threat to biodiversity caused by human activity?

Accepted Answer

Habitat destruction

Question 16

Which of the following is a real-world example of mutualism?

Accepted Answer

Bees pollinating flowers while obtaining nectar

Question 17

Which of the following best explains why energy transfer between trophic levels is inefficient?

Accepted Answer

Most energy is lost as heat due to metabolism and respiration

Question 18

Which of the following is a likely consequence of removing a top predator from an ecosystem?

Accepted Answer

Trophic cascade leading to changes in abundance of lower trophic levels

Question 19

Which of the following is a direct effect of increased atmospheric CO$$_2 on $$global biogeochemical cycles?

Accepted Answer

Enhanced greenhouse effect leading to climate change

Question 20

Which of the following actions can help mitigate the major threats to biodiversity?

Accepted Answer

Establishing protected areas and wildlife corridors

General Biology II: Final Exam Study Guide – Fungi, Animal Diversity, Ecology, and Ecosystems

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