Question 1

Which of the following best describes genetic diversity, and why is it important for the survival of a species?

Accepted Answer

It refers to the variety of genes within a population; it is important because it allows populations to adapt to changing environments.

Question 2

Which of the following is NOT an example of an ecosystem service?

Accepted Answer

The extinction of a species due to habitat loss

Question 3

A city relies on a nearby forest for clean water, flood control, and recreation. Which term best describes these benefits, and why are they critical for human survival?

Accepted Answer

Ecosystem services; they provide resources and processes essential for human well-being.

Question 4

Which of the following human activities is currently considered the greatest threat to biodiversity?

Accepted Answer

Habitat destruction and fragmentation

Question 5

Which scenario best illustrates how conservation at the species level may require action at the landscape or regional level?

Accepted Answer

Restoring a network of wetlands to support migratory birds and other species across a region

Question 6

Which of the following best defines biomagnification, and why does it occur in food chains?

Accepted Answer

The accumulation of non-biodegradable toxins at higher concentrations in organisms at higher trophic levels; it occurs because toxins are stored in body tissues and passed up the food chain.

Question 7

A pesticide is sprayed on crops and enters a nearby lake. Over time, fish-eating birds are found to have high levels of the pesticide in their tissues. This is an example of:

Accepted Answer

Biomagnification

Question 8

Which equation best represents the greenhouse effect's relationship between atmospheric carbon dioxide and global temperature?

Accepted Answer

$$ \Delta T = \lambda \cdot \Delta F_{CO_2$} $$

Question 9

Why will the effects of carbon dioxide emitted today still impact Earth's climate 50 years from now?

Accepted Answer

CO2 remains in the atmosphere for decades to centuries, continuing to trap heat.

Question 10

Which of the following is a real-world example of a human action that can mitigate climate change and limit biotic extinctions?

Accepted Answer

Expanding protected areas to preserve habitats and allow species migration

Question 11

Which of the following statements about ecosystem services is most accurate?

Accepted Answer

Ecosystem services include processes like pollination, water purification, and climate regulation.

Question 12

Which of the following best explains why 'saving a species' often requires protecting its entire habitat?

Accepted Answer

Species depend on interactions with other organisms and the physical environment, so protecting the habitat supports the whole ecosystem.

Question 13

Which of the following is an example of conflicting demands that conservation scientists must weigh when setting priorities?

Accepted Answer

Choosing between building a dam for human water needs and preserving a river ecosystem for endangered fish

Question 14

Which of the following is NOT a primary threat to biodiversity?

Accepted Answer

Natural selection

Question 15

Why is the statement 'Without ecosystem services there are no human beings' NOT an exaggeration?

Accepted Answer

Ecosystem services provide essential resources and processes, such as clean air, water, and food, that humans need to survive.

Question 16

Which of the following best explains why there is more $$CO_2 in $$the atmosphere now than 100 years ago?

Accepted Answer

Deforestation and burning of fossil fuels by humans

Question 17

A conservation biologist is tasked with protecting a rare frog species. Which multi-step approach would best increase the frog's chances of survival?

Accepted Answer

Restoring wetlands, controlling pollution, and connecting fragmented habitats to allow gene flow

Question 18

Which of the following is an example of how global warming can impact species and ecosystems?

Accepted Answer

Altering migration patterns and causing coral bleaching due to increased ocean temperatures

Question 19

Which of the following actions would most effectively reduce the rate of biotic extinctions caused by climate change?

Accepted Answer

Transitioning to renewable energy sources to reduce greenhouse gas emissions

Question 20

Which of the following best describes the process of biomagnification using a real-world example?

Accepted Answer

Mercury released from factories accumulates in small fish, which are eaten by larger fish, and then by humans, resulting in higher mercury concentrations at each trophic level.

Human Impacts on Ecosystems & Conservation Biology (Ch. 43 Study Guide)

Study Guide - Practice Questions

Study Guide - Flashcards