BIO 242 EXAM 3 Questions And Answers With
Complete Solutions
1. 5 major animal lineages
- ANSWER: -porifera (sponges)
-Ctenophora (comb jellies)
-cnidaria (corals jellyfish etc).
-Protostomes
-deuterostomes
(porcupines Tend to Nip Playful Dogs
2. diversity of protostomes - ANSWER: Arthropoda make up most, this includes
insects chelicerates, crustaceans and myriapods. Insects are the are the most
diverse.
3. traits that arose in protostomes (3)
- ANSWER: -bilateral symmetry
-triploblasty (3 germ layers)
-cephalization (head and brains)
4. where/what did radial symmetry evolve independently in? - ANSWER:
echinoderms
5. Cephalization - ANSWER: evolution of a head with structures for feeding,
sensing the environment and processing information.
6. Triploblastic and the layers.
- ANSWER: animals whose embryos have three types of tissues (aka germ
layers).
-Ectoderm ("outside skin") gives rise to skin and nervous system.
-Endoderm ("inside skin") gives rise to the lining of the digestive
track.
-Mesoderm ("middle-skin") gives rise to the circulatory system,
muscle, bones, organs ect.
#$%^&*(
7. Protostomes vs/ Deuterstomes &^%$#$%
- ANSWER: Protostomes (mouth first) embryo develops mouth before anus. ^&*()*&^
deuterostomes (second mouth) embryo develops anus before
%$#$%^&
mouth.
*()(*&^%
8. diploblasts and layers $#$&*()*
- ANSWER: animals whose embryo have two types of tissue (aka germ layer) &^%$#$%
-ectoderm ("outside skin") gives rise to skin and nervous system. ^&*()*&^
-Endoderm ("inside skin") gives rise to the lining of the digestive
%$#$%^&
tract.
*()*&^%$
#@#$%^
&*()_(*&
^%$#$%^
&*()(*&^
, BIO 242 EXAM 3 Questions And Answers With
Complete Solutions
9. two groups of diploblasts
- ANSWER: -Ctenophora (comb jellies)
-Cnidaria (jellyfish, corals, sea pends, hydra and anemones).
10. Acdysozoa: Arthropods (abundance and diversity, 3 part body plan).
- ANSWER: -Most abundant animal in aquatic and terrestrial environments.
1. segmented body
2. exoskeleton
3. jointed appendages
11. segmented bodies of insects - ANSWER: head, thorax and abdomen
12. segmented bodies of spiders and crustaceans - ANSWER: cephalothorax
(head-chest) and abdomen.
13. exoskeleton of arthropods - ANSWER: hard external covering made of chitin.
Strengthened by calcium carbonate in crustaceans.
14. jointed appendages in arthropods - ANSWER: jointed appendages that allow
for rapid and precise movement. Can serve diverse functions.
15. Origin of wings (who got them, what part of the body do they extend from and
what is the benefit of wings?)
- ANSWER: -Insects were the first animals to achieve powered flight.
-Unjointed extensions of cuticle on the thorax.
-allows them to escape predators, find food, disperse to new
habitats.
16. metamorphosis - ANSWER: transformation from an immature form to an adult
in two or more distinct stages.
#$%^&*(
17. 2 kinds of metamorphosis - ANSWER: incomplete (look like before) and &^%$#$%
complete (look nothing like before) ^&*()*&^
%$#$%^&
18. 4 key lineages of arthropods
*()(*&^%
- ANSWER: myriapods
$#$&*()*
insects
crustaceans &^%$#$%
chelicerates ^&*()*&^
(miracles in crusty Chelly) %$#$%^&
*()*&^%$
#@#$%^
&*()_(*&
^%$#$%^
&*()(*&^
Complete Solutions
1. 5 major animal lineages
- ANSWER: -porifera (sponges)
-Ctenophora (comb jellies)
-cnidaria (corals jellyfish etc).
-Protostomes
-deuterostomes
(porcupines Tend to Nip Playful Dogs
2. diversity of protostomes - ANSWER: Arthropoda make up most, this includes
insects chelicerates, crustaceans and myriapods. Insects are the are the most
diverse.
3. traits that arose in protostomes (3)
- ANSWER: -bilateral symmetry
-triploblasty (3 germ layers)
-cephalization (head and brains)
4. where/what did radial symmetry evolve independently in? - ANSWER:
echinoderms
5. Cephalization - ANSWER: evolution of a head with structures for feeding,
sensing the environment and processing information.
6. Triploblastic and the layers.
- ANSWER: animals whose embryos have three types of tissues (aka germ
layers).
-Ectoderm ("outside skin") gives rise to skin and nervous system.
-Endoderm ("inside skin") gives rise to the lining of the digestive
track.
-Mesoderm ("middle-skin") gives rise to the circulatory system,
muscle, bones, organs ect.
#$%^&*(
7. Protostomes vs/ Deuterstomes &^%$#$%
- ANSWER: Protostomes (mouth first) embryo develops mouth before anus. ^&*()*&^
deuterostomes (second mouth) embryo develops anus before
%$#$%^&
mouth.
*()(*&^%
8. diploblasts and layers $#$&*()*
- ANSWER: animals whose embryo have two types of tissue (aka germ layer) &^%$#$%
-ectoderm ("outside skin") gives rise to skin and nervous system. ^&*()*&^
-Endoderm ("inside skin") gives rise to the lining of the digestive
%$#$%^&
tract.
*()*&^%$
#@#$%^
&*()_(*&
^%$#$%^
&*()(*&^
, BIO 242 EXAM 3 Questions And Answers With
Complete Solutions
9. two groups of diploblasts
- ANSWER: -Ctenophora (comb jellies)
-Cnidaria (jellyfish, corals, sea pends, hydra and anemones).
10. Acdysozoa: Arthropods (abundance and diversity, 3 part body plan).
- ANSWER: -Most abundant animal in aquatic and terrestrial environments.
1. segmented body
2. exoskeleton
3. jointed appendages
11. segmented bodies of insects - ANSWER: head, thorax and abdomen
12. segmented bodies of spiders and crustaceans - ANSWER: cephalothorax
(head-chest) and abdomen.
13. exoskeleton of arthropods - ANSWER: hard external covering made of chitin.
Strengthened by calcium carbonate in crustaceans.
14. jointed appendages in arthropods - ANSWER: jointed appendages that allow
for rapid and precise movement. Can serve diverse functions.
15. Origin of wings (who got them, what part of the body do they extend from and
what is the benefit of wings?)
- ANSWER: -Insects were the first animals to achieve powered flight.
-Unjointed extensions of cuticle on the thorax.
-allows them to escape predators, find food, disperse to new
habitats.
16. metamorphosis - ANSWER: transformation from an immature form to an adult
in two or more distinct stages.
#$%^&*(
17. 2 kinds of metamorphosis - ANSWER: incomplete (look like before) and &^%$#$%
complete (look nothing like before) ^&*()*&^
%$#$%^&
18. 4 key lineages of arthropods
*()(*&^%
- ANSWER: myriapods
$#$&*()*
insects
crustaceans &^%$#$%
chelicerates ^&*()*&^
(miracles in crusty Chelly) %$#$%^&
*()*&^%$
#@#$%^
&*()_(*&
^%$#$%^
&*()(*&^
