Question 1

The chordate group includes these animals.

Accepted Answer

Chordates are a group of animals that possess a notochord, a dorsal nerve cord, pharyngeal gill slits, and a post-anal tail at some point in their development. This includes all vertebrates such as fish, amphibians, reptiles, birds, and mammals. The other choices listed are not chordates. Arthropods and mollusks are both invertebrates, which means they lack a backbone and other features characteristic of chordates. Cnidarians are also invertebrates and lack the defining features of chordates.

Question 2

All species of fungi are

Accepted Answer

All fungi are heterotrophs, meaning they obtain their nutrients by absorbing organic matter, as they cannot produce their own food through photosynthesis.

Question 3

Walking past a pond in Olympic National Forest,you spot the head of an animal that is swimming through the water.You can clearly see that the animal has fur but can't see anything else.Based on your observation,you know that the animal is a

Accepted Answer

The presence of fur indicates that the animal is a mammal, and all mammals are vertebrates (having a backbone), making the correct answer that the animal is both a vertebrate and a mammal.

Question 4

A protist is the common ancestor of

Accepted Answer

Since protists are a diverse group of organisms that includes unicellular and multicellular eukaryotes, all of the listed groups (plants, animals, fungi, and slime molds) have evolved from a protist ancestor.

Question 5

Which would NOT be considered a protist?

Accepted Answer

The answer of Which would NOT be considered a protist?
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Question 6

Which is NOT true of yeast?

Accepted Answer

Yeast is a unicellular organism, therefore it is not multicellular.

Question 7

Fungi are found

Accepted Answer

Fungi are found in a wide range of habitats including on, in, and under vegetation, on and in animals, in soil, and in dead trees and animal carcasses. Therefore, all the given choices are correct.

Question 8

As you rest on a rock in a subalpine meadow in Olympic National Park,you see a small,hard-bodied animal next to your rock.On closer examination,you see that it has a hard,jointed exoskeleton and four pairs of jointed legs.It is a(n)

Accepted Answer

The description matches that of an arthropod, which is a group of animals with a hard exoskeleton and jointed legs. Insects are a type of arthropod, but the description does not provide enough information to determine whether the animal is specifically an insect. Mollusks and annelids are both invertebrates, but they do not have hard exoskeletons or jointed legs.

Question 9

Sitting beside a stream in Olympic National Park,you see a dragonfly perching on a piece of grass next to the water.You can easily see its hard,jointed exoskeleton,its three pairs of jointed legs,and its three-part body.You know,therefore,that it is a(n)

Accepted Answer

Dragonflies are both arthropods and insects. Arthropods are characterized by their hard exoskeleton, jointed legs, and segmented bodies, which includes insects. Insects specifically have three pairs of jointed legs and a body divided into three parts: the head, thorax, and abdomen, all of which apply to a dragonfly.

Question 10

Which does NOT describe a member of the kingdom Fungi?

Accepted Answer

All of the statements A through D can describe members of the kingdom Fungi. Fungi can be pathogens (A), reproduce both asexually and sexually (B), live symbiotically as lichens (C), and act as decomposers (D).

Question 11

Fungi play a crucial ecological role in all terrestrial ecosystems,including those in Olympic National Park.What is that role?

Accepted Answer

Fungi are primarily decomposers, breaking down dead organisms and recycling their nutrients. This is a crucial ecological role because it contributes to the nutrient cycling and overall health of the ecosystem, allowing other organisms to thrive.

Question 12

These single-celled fungi can ferment sugars or cause disease.

Accepted Answer

Yeast is well-known for its ability to ferment sugars, producing alcohol and carbon dioxide. Yeast is also a type of fungus that can cause infections in humans, including skin infections and thrush.

Question 13

Walking through Olympic National Park,you find a soft-bodied animal with no shell under some moist leaves.It is a(n)

Accepted Answer

Mollusks and annelids can both be soft-bodied and lack a shell, such as slugs (a type of mollusk) and earthworms (a type of annelid). Without more specific information about the animal's characteristics, it's impossible to definitively categorize it as one or the other.

Question 14

All animals are descended from a(n)

Accepted Answer

The earliest known organisms that can be considered animals are protists, specifically a group of colonial flagellates called choanoflagellates. These protists are the closest living relatives of animals and share many of their molecular and cellular characteristics. Therefore, it is believed that all animals are descended from an ancestral protist.

Question 15

Which term can be used to describe a protist?

Accepted Answer

A protist can be either autotrophic or heterotrophic, meaning they can produce their own food or consume other organisms for nutrients. They also have the ability to decompose and act as saprotrophs. Therefore, all of the answer choices are correct when describing a protist.

Question 16

All of the following are TRUE of fungi,EXCEPT

Accepted Answer

Fungi are heterotrophs, not autotrophs. They obtain their nutrients by absorbing organic molecules from other organisms.

Question 17

Fungi evolved approximately

Accepted Answer

Fossil evidence suggests that fungi evolved around 1 billion years ago from a single-celled protist ancestor.

Question 18

In general,most protists are susceptible to

Accepted Answer

Most protists are aquatic organisms and are highly susceptible to drying out or desiccation when removed from their moist environments.

Question 19

Fungi are members of the domain

Accepted Answer

Fungi are eukaryotic organisms, meaning that their cells have a true nucleus and other membrane-bound organelles. They are not bacteria (A), protists (B), archaea (C), or monera (D), which are all groups of prokaryotic organisms lacking these features.

Question 20

Which is NOT true of protists?

Accepted Answer

Protists are usually found in aquatic environments, including freshwater and marine environments. They are not typically found in terrestrial areas like deserts or forests.

Quiz 18: Eukaryotic Diversity