Intro to Animals
An animal that has no back bone is called a (an) _________.
a. invertebrate
b. vertebrate
c. nematode
d. amphibian
a. invertebrate
_________, causes an organism to respond or react.
Stimulus
How do sessile, aquatic animals get their food?
Water currents to bring food to them
What is the difference between gastropods shells and bivalves shells?
Gastropods have a single spiral shell, while bivalves have two shells connected by a hinge.
Which characteristic is NOT common to all arthropods?
a. segmented body
b. jointed appendages
c. backbone
d. exoskeleton
c. backbone
A zygote divides by a process known as __________________.
Clevage
Conditioning is when behavior is __________ to get a desired response from a stimulus.
modified
Cnidarians pull prey to their mouths with their ________________.
Tentacles
Explain how cephalopods move.
Jet propulsion
exoskeleton
Which of the following animals is NOT radially symmetrical?
A. Sea Star
B. Hydra
C. Spider
D. Sea Urchin
C. Spider
_______________ is a type of learned behavior in which a newborn forms an attachment to another organism after birth or hatching.
Imprinting
Which of the following is NOT a flat worm?
a. earthworm
b. fluke
c. planarian
d. tapeworm
a. earthworm
Arthropods ________, or shed their old exoskeletons.
Molt
Insect larva are specialized for__________.
a. reproducing
b. surviving wither
c. breathing
d. eating and growing
d. eating and growing
What layer of the gastrula become muscles?
a. ectoderm
b. endoderm
c. mesoderm
d. all of the above
c. mesoderm
When an organism develops during an animals lifetime as a result of experience or practice is called ____________.
Learned behavior
When biologists use the terms medusa and polyp to describe this invertebrate, what are they talking about?
body shapes of cnidarians
Many arthropods have three distinct body sections: a(n) ____________, a(n) _____________, and a(n) _________________.
Head, thorax, abdomen
What is not a stage of complete metamorphosis?
a. egg
b. nymph
c. larva
d. pupa
b. nymph
You have discovered a new organism -- what characteristics must it have in order to be classified as an animal?
Multicellular, heterotrophic, cells lacking a cell wall
What is the difference between an instinct and a reflex? Give an example of an instinct and reflex.
Instinct is complex pattern of innate behaviors (spider spinning web). Reflex is an automatic response. (blinking)
Explain what radial symmetry, bilateral symmetry and asymmetry mean.
Radial means the animal is the same from the center out. Bilateral means they are the same if divided in half. Asymmetry means no symmetry.
A ______________ has the most complex nervous systems of an invertebrate.
a. cephalopod
b. gastropod
c. bivalve
d. flatworm
c. cephalopod
Explain the complete stages of metamorphosis.
The insect starts as an egg and hatches to be a larva. The larva changes to a pupa and then finally the adult version of the insect.