Biology 1108 Unit 3 Exam Questions
with Correct Answers 2025
Which of the following describes the relationship of mycorrhizal fungi and plants? -
CORRECT ANSWER -they live in and among plant roots, supplying plants with nutrients.
Fungi that absorb nutrients from decaying plant matter are called .-
CORRECT ANSWER -saprobes
Which of the following best describes how fungi are able to obtain nutrition? -
CORRECT ANSWER -absorbing nutrient via external digestion
The main body of a fungus, which is composed of a mass of tubular hyphae: -
CORRECT ANSWER -mycelium
Lichens are symbiotic associations of fungi and . - CORRECT ANSWER -
cyanobacteria or green algae
Which of these fungal features supports the phylogenetic conclusion that fungi are more cl
osely related to animals than to plants? - CORRECT ANSWER -
The cell walls of fungi are made of chitin.
A mold with coeonocytic hyphae is discovered. Which statement would best describe these
hyphae? - CORRECT ANSWER -they have no walls, and multiple nuclei.
These cnidarians secrete a calcium carbonate exoskeleton and form symbiotic relationships
with protists that photosynthesize in the clear waters of the tropics: - CORRECT ANSWER -
corals
, The digestive system of most animals is lined with cells through which nutrients are absorb
ed. What is the embryonic origin of these cells? - CORRECT ANSWER -endoderm
Referring to the figure below, which organism possesses a pseudocoelomate body plan? -
CORRECT ANSWER -Roundworm
These flagellated, colonial, protists are thought to closely resemble the ancestor of all anim
als: - CORRECT ANSWER -choanoflagellate
An organism that exhibits a head and central nervous system probably also .-
CORRECT ANSWER -bilaterally symmetrical
The internal skeleton of sponges is supported by glassy or calcium carbonate spines called:
- CORRECT ANSWER -spicules
Which of the following best describes the evolutionary process of cephalization? -
CORRECT ANSWER -the formation of a head, as a response to hunting and seeking prey
Which of the following statements would best describe a triploblastic animal? -
CORRECT ANSWER -One that possess three embryonic tissue layers
These non-bilaterian animals swim using comb-
like plates of cilia, and capture prey using sticky tentacles: - CORRECT ANSWER -Ctenophora
Which of the following is NOT a characteristic of animals? - CORRECT ANSWER -
chitin within cell walls
Which of the following animals would be considered asymmetric? - CORRECT ANSWER -
sponges
with Correct Answers 2025
Which of the following describes the relationship of mycorrhizal fungi and plants? -
CORRECT ANSWER -they live in and among plant roots, supplying plants with nutrients.
Fungi that absorb nutrients from decaying plant matter are called .-
CORRECT ANSWER -saprobes
Which of the following best describes how fungi are able to obtain nutrition? -
CORRECT ANSWER -absorbing nutrient via external digestion
The main body of a fungus, which is composed of a mass of tubular hyphae: -
CORRECT ANSWER -mycelium
Lichens are symbiotic associations of fungi and . - CORRECT ANSWER -
cyanobacteria or green algae
Which of these fungal features supports the phylogenetic conclusion that fungi are more cl
osely related to animals than to plants? - CORRECT ANSWER -
The cell walls of fungi are made of chitin.
A mold with coeonocytic hyphae is discovered. Which statement would best describe these
hyphae? - CORRECT ANSWER -they have no walls, and multiple nuclei.
These cnidarians secrete a calcium carbonate exoskeleton and form symbiotic relationships
with protists that photosynthesize in the clear waters of the tropics: - CORRECT ANSWER -
corals
, The digestive system of most animals is lined with cells through which nutrients are absorb
ed. What is the embryonic origin of these cells? - CORRECT ANSWER -endoderm
Referring to the figure below, which organism possesses a pseudocoelomate body plan? -
CORRECT ANSWER -Roundworm
These flagellated, colonial, protists are thought to closely resemble the ancestor of all anim
als: - CORRECT ANSWER -choanoflagellate
An organism that exhibits a head and central nervous system probably also .-
CORRECT ANSWER -bilaterally symmetrical
The internal skeleton of sponges is supported by glassy or calcium carbonate spines called:
- CORRECT ANSWER -spicules
Which of the following best describes the evolutionary process of cephalization? -
CORRECT ANSWER -the formation of a head, as a response to hunting and seeking prey
Which of the following statements would best describe a triploblastic animal? -
CORRECT ANSWER -One that possess three embryonic tissue layers
These non-bilaterian animals swim using comb-
like plates of cilia, and capture prey using sticky tentacles: - CORRECT ANSWER -Ctenophora
Which of the following is NOT a characteristic of animals? - CORRECT ANSWER -
chitin within cell walls
Which of the following animals would be considered asymmetric? - CORRECT ANSWER -
sponges
