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WorksheetsIntroduction to Animals
Total questions: 27
Worksheet time: 14mins
Almost all animals share the following characteristics except _________________.
heterotrophy
mobility
multicellularity
cell walls
How do invertebrate chordates differ from vertebrates?
Vertebrates have a backbone, and invertebrate chordates do not.
Vertebrates have a notochord, and invertebrate chordates do not.
Invertebrate chordates have a hollow nerve cord, but not vertebrates.
Invertebrate chordates have a postanal tail, but not vertebrates.
A unique characteristic of animals that distinguishes them from the members of the other kingdoms is that animals
have more complex and rapid movements.
have cells with rigid cell walls.
have organs but no tissues.
include both aquatic and terrestrial species.
Ganglia are __________________________________.
clusters of nerve cells
primitive nerve cells
clusters of neurons
None of the above.
Animals are often informally grouped as ___________________________________.
vertebrates or invertebrates
heterotrophs or autotrophs
heterotrophs or autotrophs
aquatic or terrestrial
Which type of skeleton does a vertebrate have?
Exoskeleton.
Hydrostatic skeleton.
Endoskeleton.
Pseudoskeleton.
Which animal has the simplest type of nervous system
a hydra with a nerve net
a flatworm with branched nerves
a grasshopper with eye
a human with a full sensory system and brain
The vast majority of animals are _____________________.
mammals
invertebrates
vertebrates
aquatic
Which is an advantage of having a segmented body?
The body can regenerate from one segment.
The body has great mobility and flexibility.
The body can have bright colors and patterns.
The body can divide and conquer the world.
An animal in which the space between the body wall and gut is completely filled with tissues and organs is called a(n) _________________________________.
acoelomate
pseudocoelomate
coelomate
vertebrate
An animal whose gut has only one opening has a(n) ______________________________.
intervascular cavity
gastrovascular cavity
specialized digestive tract
one-way digestive tract
A one-way digestion system allows for
a quicker digestion.
specialization and more efficient digestion.
exposure of every cell to all stages of digestion.
the removal of waste produced by cellular metabolism.
The largest structure on Earth that was built by living organisms is the ______________________.
Great Wall of China
Grand Canyon
Grand Coulee Dam
Great Barrier Reef
The backbone supports and protects the ________________________.
heart and lungs
liver and kidneys
abdominal muscles
dorsal nerve cord
Without a __________________________________, an animal could not eliminate the waste products of cellular metabolism.
excretory system
digestive system
respiratory system
circulatory system
Which embryonic characteristic of chordates develops into structures in the head and neck in land vertebrates?
Dorsal nerve cord.
Notchord.
Pharyngeal pouches.
Postanal tail.
Humans have postanal tails
all of their lives.
briefly at birth.
only as embryos.
until puberty
Animals that have their body parts arranged around a central point have ______________________.
asymmetry
radial symmetry
bilateral symmetry
spherical symmetry
All animals are
capable of walking on legs.
multicellular, heterotrophic and lack cell walls.
land-dwelling multicellular heterotrophs.
characterized by having complex organ systems.
.___________________________ is the formation of the embryonic germ layers.
Cleavage
Gastrulation
Blastula formation
Fertilization
In which chordates did the amniotic egg first develop?
Tunicates.
Reptiles.
Amphibians.
Fish.
The hollow ball of cells produced when a zygote divides rapidly is called a _______________.
blastula
blastopore
gastrula
zygospore
Single-cell organisms and sponges digest their food
in the coelom.
in a gastrovascular cavity.
inside their cells.
outside their cells.
The difference between a closed circulatory system and an open circulatory system in that
an open system does not have a heart, but a closed does have a heart.
a closed system does not have vessels, but and open system does have vessels.
blood comes in direct contact with body tissues in a closed system.
blood comes in direct contact with body tissues in an open system.
Not having cell walls gives animals the ability to ____________.
eat
move
mate
digest
Aquatic animals such as some fish and simple invertebrates
excrete concentrated urine.
excrete urea.
excrete ammonia.
do not remove wastes.
A difference between coelomates and pseudocoelomates is that
a coelomate has a true coelom and a pseudocoelomate has a false coelom.
the gut of a pseudocoelomate is surrounded by the endoderm, and the gut of a coelomate is surrounded by the organs and tissues.
one has bilateral symmetry and one does not.
pseudocoelomates have are not really animals but coelomates are.
