WorksheetsCh 24 Intro to Animals/Sponges, Cnidarians
Total questions: 23
Worksheet time: 12mins
An examples of an animal with radial symmetry is a ladybug.
True
False
An animal with an internal skeleton has an endoskeleton.
True
False
To be classified as an animal, an organism has to be able to move at some point in its life.
True
False
An animal with a body cavity completely surrounded by mesoderm is a pseudocoelomate.
True
False
An exoskeleton must be shed before the animal possessing it can grow larger.
True
False
What is the name given to an organism with an endoskeleton and a backbone?
invertebrate
vertebrate
mammal
echinoderm
Why must external fertilization always occur in water?
it is only used by fish
zygotes can only form in water
the sperm must swim to the egg
water is needed by all organisms
If you are asked to lay an organism on it's dorsal side it has ___ symmetry.
asymmetry
radial symmetry
bilateral symmetry
dorsasymmetry
What is the order of cell layers in the gastrula starting from the inner layer
endoderm, mesoderm, exoderm
exoderm, mesoderm, endoderm
endoderm, exoderm, mesoderm
mesoderm, endoderm, excoder,
Which of these is an advantage of segmentation?
reduction in the number of moving parts
having seperate functions for each segment
the protection of the exoskeleton
it allows for greater cephalization
The embryo pictured is in what stage of development?
gastrula
blastula
egg cell
sygote
The cells labeled in yellow will give rise to what part of the organism?
skin and nerves
digestive system
kidneys and liver
reproductive organs
What is the lighter under surface of a frog called?
dorsal
ventral
anterior
posterior
Which of these is NOT a characteristic of sponges?
filter feeding
digestion within cells
asymmetry
tissues
What is the structure labeled A?
osculum
ostia
spicule
choanocyte
What is the structure labeled B?
osculum
ostia
spicule
choanocyte
What is the structure labeled C?
ectoderm
ostia
spicule
choanocyte
What is the structure labeled D?
ectoderm
ostia
spicule
amebocyte
What is the structure labeled E?
ectoderm
ostia
spicule
amebocyte
What is the structure labeled F?
ectoderm
ostia
spicule
amebocyte
When touched, a jellyfish body responds as a whole, but a sponge body does not.
True
False
All animals are autotrophic.
True
False
A jellyfish can only reproduce when it is in the medusa stage.
True
False
