Question 1

All organisms have the same resource requirements.

Accepted Answer

Different species have varying requirements for resources such as water, nutrients, and space, reflecting their unique adaptations and ecological niches.

Question 2

Within a large lake, gobies are small fish that are found in regions with shallow water and a sandy bottom. This shallow, sandy region is the organism's __________, whereas the lake itself is the __________.

Accepted Answer

The shallow, sandy region is the specific environment or "microhabitat" where gobies thrive, while the lake at large, encompassing various habitats including the one preferred by gobies, is their "macrohabitat."

Question 3

Which of the following is correctly listed from smallest to largest scale?

Accepted Answer

The correct order from smallest to largest scale is organism (individual living entity), microhabitat (small, specific area where an organism lives), macrohabitat (larger area that can contain multiple microhabitats), and life zone (broad areas with similar plant and animal life, also known as a biome).

Question 4

Goldfish are very hardy fish, which is why they have been in the pet trade for so long. They are generalist feeders and can tolerate a wide range of oxygen concentrations as well as high levels of nitrogen (due to waste buildup in a small fish bowl). Based on this, goldfish ____________________.

Accepted Answer

Goldfish have a broad ecological niche because they can tolerate a wide range of environmental conditions and have a generalist feeding behavior, allowing them to thrive in various habitats.

Question 5

In humans, there are tiny mites called follicle mites that live in hair follicles. There are follicle mites associated with eyebrow and eyelash hairs as well as different species associated with pubic hairs and beard hairs. Each mite is specific to a region of the body; thus, there can be multiple species living on a single individual human. In this scenario, the person's eyebrow would be the __________.

Accepted Answer

The answer of In humans, there are tiny mites called...

Question 6

The greater the amount of resources, the faster the growth and development of an organism.

Accepted Answer

While resources are necessary for growth and development, an excess of certain resources can be toxic and hinder growth.

Question 7

How many microhabitats does a redwood provide for other organisms?

Accepted Answer

Redwoods, due to their massive size and longevity, create numerous microhabitats within their branches, bark, and surrounding area, supporting a diverse range of organisms.

Question 8

This figure shows the relationship between average moisture and temperature across several different life zones. How many different life zones experience temperatures greater than 20°F and less than 100 inches of annual precipitation?

Accepted Answer

The answer of  This figure shows the relationship between...

Question 9

Many weed species such as dandelions are able to colonize new regions quickly and are very short-lived but produce lots of seeds. Other species live longer periods, sometimes many years, but also take several years to reach sexual maturity. These two different lifestyles are an example of a __________.

Accepted Answer

These two different lifestyles illustrate a tradeoff, where different strategies are used for survival and reproduction. Some species prioritize rapid reproduction, while others invest in longevity and delayed reproduction.

Question 10

Crab spiders can be found sitting on top of flowers in fields. They are easily visible on warm sunny days. This is an example of an organism's __________.

Accepted Answer

Crab spiders sitting on top of flowers in fields represent an example of a microhabitat, which refers to a small, specific area within a larger habitat that supports particular organisms.

Question 11

An organism's habitat __________.

Accepted Answer

An organism's habitat includes both biotic (living) and abiotic (nonliving) components, such as water, nutrients, light, food, and other organisms, which provide the essential resources needed for survival.

Question 12

What does this figure represent?

Accepted Answer

The answer of  What does this figure represent?
...

Question 13

In the early 1900s, many people, particularly in the southern U.S., suffered from infections with parasitic hookworms. Many of these hookworms feed on blood cells of the host and thus also consume iron that is found in red blood cells. A symptom of a heavy infection is a craving to eat dirt-particularly clay-like soils with a high iron content. Thus, for these people, iron is a __________.

Accepted Answer

Iron acts as a constraint in this scenario because the hookworm infection leads to a deficiency in iron due to the parasites consuming the iron found in red blood cells. This deficiency then results in unusual behaviors such as craving to eat dirt to replenish iron levels, indicating that iron availability is a limiting factor for the health of the individuals affected.

Question 14

All of the following are true statements about life zones EXCEPT:

Accepted Answer

Animals do not typically move readily between different life zones due to the distinct environmental conditions and resources available in each zone, which can limit the ability of species to adapt or survive outside their native zones.

Question 15

All of the following are mechanisms or adaptations of organisms to the arrival of colder winter temperatures EXCEPT

Accepted Answer

Growth is not typically an adaptation to colder winter temperatures. Instead, organisms often reduce their metabolic rates, hibernate, or migrate to cope with the cold. Growth is generally more associated with favorable conditions, such as adequate resources and suitable temperatures.

Question 16

Which of the following has a broad ecological niche?

Accepted Answer

An omnivorous rodent that is active year-round and can live in a variety of different habitats demonstrates a broad ecological niche because it can exploit a wide range of food sources and environments, unlike the other options which are more specialized.

Question 17

Deserts across the globe are typically characterized by low rainfall and plants and animals that are well adapted to hot and dry conditions. As such, deserts are an example of a __________.

Accepted Answer

Deserts are considered a "life zone" because they are large ecological areas with distinct climate conditions and communities of plants and animals adapted to those conditions.

Question 18

Many weed species such as dandelions are able to colonize new regions quickly and are very short-lived but produce lots of seeds. Other species live longer periods, sometimes many years, but also take several years to reach sexual maturity. Based on the descriptions of dandelions and weeds in general, they would be considered __________ species.

Accepted Answer

Weed species like dandelions are considered both pioneering and opportunistic because they are among the first to colonize disturbed or new areas (pioneering) and they exploit temporary habitats efficiently by growing and reproducing quickly (opportunistic).

Question 19

In humans, there are tiny mites called follicle mites that live in hair follicles. There are follicle mites associated with eyebrow and eyelash hairs as well as different species associated with pubic hairs and beard hairs. Each mite is specific to a region of the body; thus, there can be multiple species living on a single individual human. In this scenario, the human body is __________.

Accepted Answer

The human body is made up of many life zones, each with its own unique set of environmental conditions. This allows for a variety of different species of mites to live on a single human individual.

Question 20

In 2012, the Midwest experienced unusually hot, dry conditions for long periods during the summer months. As a result, many plants suspended or reduced their growth and reproduction, which had major implications for agricultural crops such as corn. This response to environmental conditions is called __________.

Accepted Answer

Dormancy is a survival strategy used by many plants to withstand unfavorable environmental conditions, such as extreme temperatures or drought. In this case, the plants suspended or reduced their growth and reproduction in response to the hot, dry conditions, which is characteristic of dormancy.

Quiz 4: Organisms in Their Habitat