BIOL 2251 EXAM 3 – Questions With
Comprehensive Solutions (A+)
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Practice questions for this set
Learn 1 /7 Study with Learn
5 of them
connects to the tube feet --> moves water
Choose an answer
1 Exoskeleton 2 Radial canal
Amniotes are divided into three
What are the advantages to having
3 4 groups. What are the groups and how
jointed legs?
do their skulls differ?
Don't know?
Terms in this set (176)
arthropod adaptation
versatile exoskeleton - does not grow
Exoskeleton
cuticle sec by underlying epidermis
cuticle composed of epi and procuticle
Chitin Layers of procuticle contain chitin bound iwth proteins
, molting needed for arthropod to increase in size
and ending of molting = ecdysis = SHEDDING OF SKIN
Ecdysis
ecdysis = 30 min and takes 2d for growth of hard shell in
crabs
molting needed for arthropod to increase in size bc
Molting exoskeleton doesn't grow
end = ecdysis
each arthropod segment has a pair of jointed
appendages
modified seg and appendages specialized of functions:
Jointed appendages
defense, sensory, feeding
each section of app functions as hollow tube moved by
muscles which are inserted on the inside
small external opening of a tracheae (cuticle)
Spiracle usually found on certain thoracic and abdominal
segments
Respiration
Tracheal system: delivers O2 directly to tissues and
cells; leads to high metabolic rate
Tracheal tubes
Trachea is open to the outside thru openings = spiracles
Not present in aquatic arthropods which use tracheal
gills
Used for respiration in aquatic arthropods which do not
Gills contain tracheal tubules
Tracheal gills present in aquatic spp
Class Insecta
3 pairs of legs and 2 pairs of wings on thoracic segment
can be present, modified, or absent
Wings
direct muscles are attached to wing - change angle of
wings
NOT appendages
Subphylum Hexapoda has 3 tagmata = head, thorax,
Tagmata abdomen
Tagmata = region
= complete metamorphosis
88% insects
Holometabolous
egg --> larva --> pupa (chrysalis) --> adult
molting of exoskeleton
, Incomplete metamorphosis
Egg --> nymph (larval stage) --> adult
Hemimetabolous
Pupa form is missing
Nymphs are often in diff habitat than adults
What are the advantages to Flexibility, stability, range of motion, shock of absorption
having jointed legs?
How did the Arthropod + : prot by covering soft internal organs and muscle,
exoskeleton help them prot against dehydration
become so successful? - : exoskeletons do not grow and have to undergo
What are the disadvantages molting and during this time are vulnerable with no prot
of having an exoskeleton?
Versatile exoskeleton (chitin)
Segmentation and appendages for more efficient
What is an example of
locomotion
adaptation of an old body
Air distribution directly to cells
part to conquer a new
Highly developed sensory organs
ecological niche?
Complex behavior patterns
Modified appendages --> defense, sensory, feeding
Which phylum was the first Arthropoda: move from water to land
to leave the ocean and millipedes
colonize land?
loss of habitat for monarch butterflies : pesticides,
Causes of Monarch
herbicide (control weeds - killing milkweed), overwinter
butterfly population
habitat (destruction of habitat), climate change, logging
decline
deforestation, parasites
distribution of milkweed seeds
Conservation attempts for campaigns against logging
Monarch butterfly new trees planted
population research on pesticides that target specific spp.
tourism increases awareness
Deuterostomia Echinoderms and chordates
cleavage: radial and indeterminate (fate det. later)
coelom formation: mesoderm buds from wall of
Deuterostomes
archenteron --> coelom
fate of blastopore: --> anus
Comprehensive Solutions (A+)
Save
Practice questions for this set
Learn 1 /7 Study with Learn
5 of them
connects to the tube feet --> moves water
Choose an answer
1 Exoskeleton 2 Radial canal
Amniotes are divided into three
What are the advantages to having
3 4 groups. What are the groups and how
jointed legs?
do their skulls differ?
Don't know?
Terms in this set (176)
arthropod adaptation
versatile exoskeleton - does not grow
Exoskeleton
cuticle sec by underlying epidermis
cuticle composed of epi and procuticle
Chitin Layers of procuticle contain chitin bound iwth proteins
, molting needed for arthropod to increase in size
and ending of molting = ecdysis = SHEDDING OF SKIN
Ecdysis
ecdysis = 30 min and takes 2d for growth of hard shell in
crabs
molting needed for arthropod to increase in size bc
Molting exoskeleton doesn't grow
end = ecdysis
each arthropod segment has a pair of jointed
appendages
modified seg and appendages specialized of functions:
Jointed appendages
defense, sensory, feeding
each section of app functions as hollow tube moved by
muscles which are inserted on the inside
small external opening of a tracheae (cuticle)
Spiracle usually found on certain thoracic and abdominal
segments
Respiration
Tracheal system: delivers O2 directly to tissues and
cells; leads to high metabolic rate
Tracheal tubes
Trachea is open to the outside thru openings = spiracles
Not present in aquatic arthropods which use tracheal
gills
Used for respiration in aquatic arthropods which do not
Gills contain tracheal tubules
Tracheal gills present in aquatic spp
Class Insecta
3 pairs of legs and 2 pairs of wings on thoracic segment
can be present, modified, or absent
Wings
direct muscles are attached to wing - change angle of
wings
NOT appendages
Subphylum Hexapoda has 3 tagmata = head, thorax,
Tagmata abdomen
Tagmata = region
= complete metamorphosis
88% insects
Holometabolous
egg --> larva --> pupa (chrysalis) --> adult
molting of exoskeleton
, Incomplete metamorphosis
Egg --> nymph (larval stage) --> adult
Hemimetabolous
Pupa form is missing
Nymphs are often in diff habitat than adults
What are the advantages to Flexibility, stability, range of motion, shock of absorption
having jointed legs?
How did the Arthropod + : prot by covering soft internal organs and muscle,
exoskeleton help them prot against dehydration
become so successful? - : exoskeletons do not grow and have to undergo
What are the disadvantages molting and during this time are vulnerable with no prot
of having an exoskeleton?
Versatile exoskeleton (chitin)
Segmentation and appendages for more efficient
What is an example of
locomotion
adaptation of an old body
Air distribution directly to cells
part to conquer a new
Highly developed sensory organs
ecological niche?
Complex behavior patterns
Modified appendages --> defense, sensory, feeding
Which phylum was the first Arthropoda: move from water to land
to leave the ocean and millipedes
colonize land?
loss of habitat for monarch butterflies : pesticides,
Causes of Monarch
herbicide (control weeds - killing milkweed), overwinter
butterfly population
habitat (destruction of habitat), climate change, logging
decline
deforestation, parasites
distribution of milkweed seeds
Conservation attempts for campaigns against logging
Monarch butterfly new trees planted
population research on pesticides that target specific spp.
tourism increases awareness
Deuterostomia Echinoderms and chordates
cleavage: radial and indeterminate (fate det. later)
coelom formation: mesoderm buds from wall of
Deuterostomes
archenteron --> coelom
fate of blastopore: --> anus
