BIOL134: Chapter 21-27 Exam | Questions and
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Terms in this set (70)
The main functions of epithelial secrete
tissues are to cover, line, protect,
and ________.
ingest
communicate
secrete
transport oxygen
store nutrients
What are the different cell layers germ layers
formed during gastrulation called?
germ layers
medial layers
developmental layers
stratified layers
,Which types of effects are Hox number of body segments
genes responsible for? Select all that number of placement of appendages
apply. animal head-tail directionality
number of body segments
number of placement of
appendages
number and location of fat cells
degree of hair coverage
animal head-tail directionality
F. size of limbs
What does the term protostome mouth first
refer to?
head first
anus first
mouth first
organs first
skin first
Prior to the use of molecular data, the fossil record
animals were classified mainly using
morphological characteristics and
________.
physiologic characteristics
the fossil record
geographical location
niche utilixation
What two clades now make up the ecdysozoan and lophotrochozoan
protostomes?
platyhelminthes and sponges
cnidaria and ctenophora
ecdysozoan and lophotrochozoan
acoelomorphs and annelids
chordates and rotifers
, For a long time it was thought that tiny, sessile, and soft bodies
the earliest life forms had what kind
of characteristics?
tiny, sessile, and soft bodies
large, flagellated, and shelled bodies
small, ciliated and exoskeletal bodies
small,flagellated, and bony bodies
Which of the following is NOT one of avians
the animal groups thought to have
arisen in the Cambrian period?
arthropods
worms
mollusks
echinoderms
avians
How do events like extreme volcanic cause mass extinctions followed by adaptive
eruptions and meteor strikes on the radiations of survivors to fill empty niches
earth increase biological diversity?
expose new nutrients for life and
warm the atmosphere
cause mass extinctions followed by
adaptive radiations of survivors to fill
empty niches
create massive migrations to new
territories and increase mutation rate
eliminate the weak and allow strong
to redevelop the same species
alter embryonic development due to
changed environmental conditions
Answers | Verified Solutions | 2026 Edition | Pass
Guaranteed
Save
Terms in this set (70)
The main functions of epithelial secrete
tissues are to cover, line, protect,
and ________.
ingest
communicate
secrete
transport oxygen
store nutrients
What are the different cell layers germ layers
formed during gastrulation called?
germ layers
medial layers
developmental layers
stratified layers
,Which types of effects are Hox number of body segments
genes responsible for? Select all that number of placement of appendages
apply. animal head-tail directionality
number of body segments
number of placement of
appendages
number and location of fat cells
degree of hair coverage
animal head-tail directionality
F. size of limbs
What does the term protostome mouth first
refer to?
head first
anus first
mouth first
organs first
skin first
Prior to the use of molecular data, the fossil record
animals were classified mainly using
morphological characteristics and
________.
physiologic characteristics
the fossil record
geographical location
niche utilixation
What two clades now make up the ecdysozoan and lophotrochozoan
protostomes?
platyhelminthes and sponges
cnidaria and ctenophora
ecdysozoan and lophotrochozoan
acoelomorphs and annelids
chordates and rotifers
, For a long time it was thought that tiny, sessile, and soft bodies
the earliest life forms had what kind
of characteristics?
tiny, sessile, and soft bodies
large, flagellated, and shelled bodies
small, ciliated and exoskeletal bodies
small,flagellated, and bony bodies
Which of the following is NOT one of avians
the animal groups thought to have
arisen in the Cambrian period?
arthropods
worms
mollusks
echinoderms
avians
How do events like extreme volcanic cause mass extinctions followed by adaptive
eruptions and meteor strikes on the radiations of survivors to fill empty niches
earth increase biological diversity?
expose new nutrients for life and
warm the atmosphere
cause mass extinctions followed by
adaptive radiations of survivors to fill
empty niches
create massive migrations to new
territories and increase mutation rate
eliminate the weak and allow strong
to redevelop the same species
alter embryonic development due to
changed environmental conditions
