BIOL 1120 FINAL EXAM WITH
CORRECT ANSWERS
2025
Both animals and fungi are heterotrophs. How does their nutritional
mode differ? ( correct answers )
Animals ingest their organic molecules, whereas fungi feed by
absorption.
Plant and fungal cells both have cell walls. Animal cells do not. What gives
animal cells structural support? ( correct answers ) Proteins
external to the cell membrane provide structural support to animal cells.
What is the most abundant extracellular protein in ( correct
animals? Collagen answers )
What two tissue types, not found in other organisms, are "central to
the animal lifestyle"? ( correct answers ) Muscle and nervous
tissue
Most animals reproduce sexually. Sperm and egg join in a process
called
to produce a zygote. ( correct
answers ) Meiosis
Early embryonic development happens in a similar way in most animals.
The zygote undergoes to produce a small ball of cells. After enough cell
divisions, the ball of cells forms a hollow . Then, one
end of the hollow ball folds inward in a process called that forms a
. ( correct answers ) Cleavage;
blastula; gastrulation; gastrula
What basal group of animals has cells that are like choanoflagellates and
what are these cells called? ( correct answers ) Sponges -
choanoflagellate cells and collar cells
Analysis of molecular evidence shows which protist group to be most
closely related to animals? ( correct answers ) Choanoflagellates
Before the Paleozoic Era, most animals were soft-bodied and left few fossils.
During the first period of the Paleozoic, the Cambrian Period, the Cambrian
explosion happened.
Describe the evolutionary events of the Cambrian explosion. ( correct
answers )
Many of the fossils from the Cambrian explosion are members of extant
animal phyla, or at least are close relatives. Some of those same fossils,
which included the first large animals, look different from most living animals.
, What features are found in the clade Bilateria that are not found in
sponges and cnidarians? ( correct answers ) These members
typically have a two-sided or bilaterally symmetric form and a
complete digestive tract.
What group were the first animals to adapt to terrestrial ( correct
habitats? Arthropods answers )
Place these events in order:
1. Origin of mammals
2. Terrestrial arthropods
3. Cambrian explosion
4. Lots of soft-bodied animals in oceans that left few fossils
5. Extinction of dinosaurs (except birds)( correct answers ) 4, 3, 2, 1, 5
What does the term animal "body plan" mean? ( correct
answers ) A particular set of morphological
and developmental traits that are integrated into the living animal
Animals with symmetry usually do not have a head and are either
sessile or planktonic ( correct answers ) Radial
Animals with symmetry have a head containing sensory organs and
a "brain" ( correct answers ) Bilateral
On a bird, the side would be the location of the breastbone
( correct answers ) Ventral
On a mammal, the side would be the side nearest the spine (
correct answers ) Dorsal
What structures develop from the ectoderm? ( correct answers )
Nervous system, inner ear, and lens of the eye
What structures develop from the endoderm? ( correct answers ) Liver,
pancreas, lungs, and lining of the GI tract
An animal with only two germ layers is . What are the names of
these two layers? ( correct answers ) Diploblastic;
ectoderm and endoderm
An animal with three germ layers is called . ( correct
answers ) Triploblastic
Animals with protosome or deuterostome development both have
germ layers.
( correct answers ) Four
CORRECT ANSWERS
2025
Both animals and fungi are heterotrophs. How does their nutritional
mode differ? ( correct answers )
Animals ingest their organic molecules, whereas fungi feed by
absorption.
Plant and fungal cells both have cell walls. Animal cells do not. What gives
animal cells structural support? ( correct answers ) Proteins
external to the cell membrane provide structural support to animal cells.
What is the most abundant extracellular protein in ( correct
animals? Collagen answers )
What two tissue types, not found in other organisms, are "central to
the animal lifestyle"? ( correct answers ) Muscle and nervous
tissue
Most animals reproduce sexually. Sperm and egg join in a process
called
to produce a zygote. ( correct
answers ) Meiosis
Early embryonic development happens in a similar way in most animals.
The zygote undergoes to produce a small ball of cells. After enough cell
divisions, the ball of cells forms a hollow . Then, one
end of the hollow ball folds inward in a process called that forms a
. ( correct answers ) Cleavage;
blastula; gastrulation; gastrula
What basal group of animals has cells that are like choanoflagellates and
what are these cells called? ( correct answers ) Sponges -
choanoflagellate cells and collar cells
Analysis of molecular evidence shows which protist group to be most
closely related to animals? ( correct answers ) Choanoflagellates
Before the Paleozoic Era, most animals were soft-bodied and left few fossils.
During the first period of the Paleozoic, the Cambrian Period, the Cambrian
explosion happened.
Describe the evolutionary events of the Cambrian explosion. ( correct
answers )
Many of the fossils from the Cambrian explosion are members of extant
animal phyla, or at least are close relatives. Some of those same fossils,
which included the first large animals, look different from most living animals.
, What features are found in the clade Bilateria that are not found in
sponges and cnidarians? ( correct answers ) These members
typically have a two-sided or bilaterally symmetric form and a
complete digestive tract.
What group were the first animals to adapt to terrestrial ( correct
habitats? Arthropods answers )
Place these events in order:
1. Origin of mammals
2. Terrestrial arthropods
3. Cambrian explosion
4. Lots of soft-bodied animals in oceans that left few fossils
5. Extinction of dinosaurs (except birds)( correct answers ) 4, 3, 2, 1, 5
What does the term animal "body plan" mean? ( correct
answers ) A particular set of morphological
and developmental traits that are integrated into the living animal
Animals with symmetry usually do not have a head and are either
sessile or planktonic ( correct answers ) Radial
Animals with symmetry have a head containing sensory organs and
a "brain" ( correct answers ) Bilateral
On a bird, the side would be the location of the breastbone
( correct answers ) Ventral
On a mammal, the side would be the side nearest the spine (
correct answers ) Dorsal
What structures develop from the ectoderm? ( correct answers )
Nervous system, inner ear, and lens of the eye
What structures develop from the endoderm? ( correct answers ) Liver,
pancreas, lungs, and lining of the GI tract
An animal with only two germ layers is . What are the names of
these two layers? ( correct answers ) Diploblastic;
ectoderm and endoderm
An animal with three germ layers is called . ( correct
answers ) Triploblastic
Animals with protosome or deuterostome development both have
germ layers.
( correct answers ) Four
