BIOLOGY 1120 TEST 2 EXAM WITH
CORRECT ANSWERS 2025
Kingdom Animalia ( correct answers ) All animals are eukaryotic,
multicellular heterotrophs that depend directly or indirectly on autotrophs
(photosynthetic bacteria, plants, and protists or chemotrophic bacteria and
archaeans) for their nourishment.
Kingdom Animalia ( correct answers ) Includes about 30 Phyla
Invertebrates ( correct answers ) Make up about 99% of all living animal
species.
Vertebrates ( correct answers ) Make up about 42,500 of all living
animal species (about 10 million)
Marine Species ( correct answers ) Most animal phyla are comprised of
this type of species, with fewer species of animals living in freshwater, and
fewer yet living in terrestrial habitats.
suspension feeders ( correct answers ) feed by filtering food from water,
air, or some other substrate (e.g., moist sand)
Deposit Feeders ( correct answers ) feed by ingesting nutrient rich deposits
such as mud which contains living organisms and other organic matter that
can be digested as food
Herbivores ( correct answers ) feed on primary producers such as
algae or plants.
Predators ( correct answers ) selectively prey on other organisms, and
even other predators in some instances.
Parasites ( correct answers ) live in or on other organisms referred to as
hosts.
All Animals ( correct answers ) are muticellular and their cells lack cell
walls. Shared a common ancestor which was a colonial protist. Many believe
that said ancestor probably was very similar to extant species of
choanoflagellates which themselves seem quite similar to the collar cells of
sponges.
Subkingdom Parazoa ( correct answers ) One of two subkingdoms the
animalia kingdom was once divided into meaning the "beside animals".
Subkingdom Eumetazoa( correct answers ) One of two subkingdoms the
animalia kingdom was once divided into meaning the "truly among
animals".
, Evolution of Tissues ( correct answers ) Members of Parazoa (the
sponges) only possess epithelial tissue... members of eumetazoa (all
other animal phyla) possess other tissues in addition to epithelial tissue.
Tissues ( correct answers ) aggregates of various cell types and matrix
materials that work together to form layers or units that appear adaptive
regarding various functions... support, movement, etc.
The evolution of tissues ( correct answers ) appears to have been the
first key transition within Animalia, and all animals have epithelial
tissue.
poriferans ( correct answers ) In the outdated 2 subkingdom system,
these (sponges) were the only member of subkingdom Parazoa and they
were (and still are) believed to be the least derived of all animals.
Evolution of body symmetry ( correct answers ) (i.e., the possession of a
body with a balanced shape) is another easy to observe characteristic that is
useful in considering animal relationships.
Asymmetrical animals ( correct answers ) animals possess no
symmetry, and phylum Porifera (the sponges) is the only phylum of
these animals. It is thought the earliest animals had this type of
symmetry.
Radially Symmetrical animals ( correct answers ) animals possess body
parts arranged about a central axis such that any plane passing through
the central axis will divide the organism into 2 relatively equal parts. Only
two major phyla contain organisms with true symmetry of this type...
phylum Cnidaria (the jellyfishes, sea anemones, and their kind) and
Ctenophora (the comb jellies).
Bilaterally symmetrical animals ( correct answers )
animals possess a body with right and left halves that are mirror images of
each other. These animals have dorsal and ventral as well as an anterior and
posterior body regions. These are an extremely diverse group and amongst
them we can observe a phenomenon referred to as cephalization... i.e., the
grouping of structures to form a body with a well-developed head end.
evolution of embryonic body layers ( correct answers ) Most animals
reproduce sexually by using cells formed via meiosis (i.e., reduction
division) that function directly as gametes. These haploid cells (i.e., the
gametes) do not divide by mitosis prior to uniting to form a zygote; thus,
animals are diplontic, i.e., only the diploid stage is multicellular.
eumetazoans ( correct answers ) animals possessing more than 1 type of
tissue.
CORRECT ANSWERS 2025
Kingdom Animalia ( correct answers ) All animals are eukaryotic,
multicellular heterotrophs that depend directly or indirectly on autotrophs
(photosynthetic bacteria, plants, and protists or chemotrophic bacteria and
archaeans) for their nourishment.
Kingdom Animalia ( correct answers ) Includes about 30 Phyla
Invertebrates ( correct answers ) Make up about 99% of all living animal
species.
Vertebrates ( correct answers ) Make up about 42,500 of all living
animal species (about 10 million)
Marine Species ( correct answers ) Most animal phyla are comprised of
this type of species, with fewer species of animals living in freshwater, and
fewer yet living in terrestrial habitats.
suspension feeders ( correct answers ) feed by filtering food from water,
air, or some other substrate (e.g., moist sand)
Deposit Feeders ( correct answers ) feed by ingesting nutrient rich deposits
such as mud which contains living organisms and other organic matter that
can be digested as food
Herbivores ( correct answers ) feed on primary producers such as
algae or plants.
Predators ( correct answers ) selectively prey on other organisms, and
even other predators in some instances.
Parasites ( correct answers ) live in or on other organisms referred to as
hosts.
All Animals ( correct answers ) are muticellular and their cells lack cell
walls. Shared a common ancestor which was a colonial protist. Many believe
that said ancestor probably was very similar to extant species of
choanoflagellates which themselves seem quite similar to the collar cells of
sponges.
Subkingdom Parazoa ( correct answers ) One of two subkingdoms the
animalia kingdom was once divided into meaning the "beside animals".
Subkingdom Eumetazoa( correct answers ) One of two subkingdoms the
animalia kingdom was once divided into meaning the "truly among
animals".
, Evolution of Tissues ( correct answers ) Members of Parazoa (the
sponges) only possess epithelial tissue... members of eumetazoa (all
other animal phyla) possess other tissues in addition to epithelial tissue.
Tissues ( correct answers ) aggregates of various cell types and matrix
materials that work together to form layers or units that appear adaptive
regarding various functions... support, movement, etc.
The evolution of tissues ( correct answers ) appears to have been the
first key transition within Animalia, and all animals have epithelial
tissue.
poriferans ( correct answers ) In the outdated 2 subkingdom system,
these (sponges) were the only member of subkingdom Parazoa and they
were (and still are) believed to be the least derived of all animals.
Evolution of body symmetry ( correct answers ) (i.e., the possession of a
body with a balanced shape) is another easy to observe characteristic that is
useful in considering animal relationships.
Asymmetrical animals ( correct answers ) animals possess no
symmetry, and phylum Porifera (the sponges) is the only phylum of
these animals. It is thought the earliest animals had this type of
symmetry.
Radially Symmetrical animals ( correct answers ) animals possess body
parts arranged about a central axis such that any plane passing through
the central axis will divide the organism into 2 relatively equal parts. Only
two major phyla contain organisms with true symmetry of this type...
phylum Cnidaria (the jellyfishes, sea anemones, and their kind) and
Ctenophora (the comb jellies).
Bilaterally symmetrical animals ( correct answers )
animals possess a body with right and left halves that are mirror images of
each other. These animals have dorsal and ventral as well as an anterior and
posterior body regions. These are an extremely diverse group and amongst
them we can observe a phenomenon referred to as cephalization... i.e., the
grouping of structures to form a body with a well-developed head end.
evolution of embryonic body layers ( correct answers ) Most animals
reproduce sexually by using cells formed via meiosis (i.e., reduction
division) that function directly as gametes. These haploid cells (i.e., the
gametes) do not divide by mitosis prior to uniting to form a zygote; thus,
animals are diplontic, i.e., only the diploid stage is multicellular.
eumetazoans ( correct answers ) animals possessing more than 1 type of
tissue.
