Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

bio 1 > week 9, apr 11th - 15th > Flashcards

week 9, apr 11th - 15th Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

What did phylum platyhelminthes evolve

A

Evolved cephalization
Evolved moving in one direction to present head first to detect danger
Evolved bilateral symmetry

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is cephalization

A

Mass of neurons in the head that can detect stimuli

Located in ganglia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is bilateral symmetry

A

Only one way to cut the animal into two equal halves

Has a head, bottom, right and left sides

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is stimuli

A

Change in the environment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What does acoelomate mean

A

Has no body cavity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Name the parts of a cross section of a planaria

A

Ectoderm, thin body, good surface for gas exchange by simple diffusion
Mesoderm
Endoderm
Gastrovascular cavity, incomplete digestive system, one opening

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Describe phylum nematoda

A

Round worms
Nematodes
Mostly parasites

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Describe phylum nematoda pseudocoelomates

A

Have a pseudocoelom

Body cavity is not completely linked with mesoderm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Describe phylum nematoda coelomates

A

Have a coelom
True body cavity
Completely linked with mesoderm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Describe cross section of a nematode pseudocoelomates

A

Pseudocoelom
Mesoderm
Ectoderm (cuticle, thick skin)
Endoderm lines the digestive tube, complete digestive system, 2 opening
digestive cavity, evolved from mouth to anus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Describe cross section of a nematode coelomates

A

Endoderm
Ectoderm
Mesdoderm
Coelom: true body cavity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Name the 2 types of coelomates

A

Protostomes

Deuterostomes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Name the protostomes phyla

A

Annelida
Arthropoda
Mollusca

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Name the deuterostome phyla

A

Echinodermata

Chordata`

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Describe protostomes

A

Spiral change
Form mouth first (blastopore)
Mesoderm origin layer blastopore
Determinate: all cells specialize at the same time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Describe deuterostomes

A

Radial cleavage
Blastopore becomes anus, forms anus first
Mesoderm origin at roof of archenteron
Archenteron, primitive gut (digestive tract)
Indeterminate: not all cells specialize (stem cells)

17
Q

Describe radial cleavage

A

8 cells embryo
Mitosis
Cleavage = rapid cell division with no cellular growth (no G1)

18
Q

Describe phylum Annelida

A

Segmented worms (earthworm, sandworm, leech)
Protostome, coelomates
Closed circulatory system, transports blood within blood vessel, using hearts creating a blood movement/pressure
Need moist skin to absorb oxygen and excrete carbon dioxide by simple diffusion

19
Q

What does a sandworm have

A

Gills called parapodia

Ventral nerve cord

20
Q

Describe the organisms in phylum arthropoda

A 
Insects (6 legs)
Arachnida (spiders, scorpions, ticks, 8 legs)
Crustacea (shrimp, crab, lobster)
Centipede 
Millipede
21
Q

Describe characteristics of phylum arthropoda

A 
Exoskeleton composed of chitin (anchors muscles)
Coelomates
Protostome 
Articulated limbs 
Cephalization (head)
Ventral nerve cord
22
Q

Name the 3 body parts of an insect

A

Head (sensory)
Thorax (locomotion)
Abdomen

23
Q

What circulatory system does phylum arthropoda have

A

Open circulatory system

24
Q

Describe open circulatory system of phylum arthropoda

A

Dorsal heart
Short blood vessels
Ostia = valves to reabsorb hemolymph

25
Q

What is hemolymph in phylum arthropoda

A

Doesn’t transport oxygen

26
Q

Is the open circulatory system of phylum arthropoda good

A

NO, cannot circulate “blood” without a blood pressure

27
Q

State respiratory systems of phylum arthropoda

A

Aquatic arthropods have gills

Land/terrestrial = tracheal system (insect, millipedes, centipedes)

28
Q

Name 4 parts of tracheal system (phylum arthropoda) and explain them

A 
Spiracle = entry to respiratory system 
Trachea = wind pipe 
Airsacs = move the air/ventilate 
Tracheole = smaller tubes to deliver gases (O2) directly to organs
29
Q

Describe phylum mollusca

A

Coelomate
Protostome
Spiral cleavage

30
Q

Describe organisms in phylum mollusca that have an open circulatory system

A

Snails

Bivalves (2 shells) clams, mussels, oysters, scallops

31
Q

Describe organisms in phylum mollusca that have a closed circulatory system

A

Squid

Octopus

32
Q

Describe phylum mollusca common features

A

Foot for movement
Visceral mass (organs)
Mantle secretes shell (if present)

33
Q

What do terrestrial molluscs have

A

Lungs

34
Q

What do aquatic molluscs have

A

Gills

35
Q

What are the organisms in phylum echinodermata

A

Sea star (star fish)
Sea urchins
Sanddollars
Sea cucumbers

36
Q

Describe phylum echinodermata

A

Coelomates
Deuterostomes
Radial symmetry as adult
Unique water vascular system

37
Q

Describe water vascular system of phylum echinodermata

A

Madreporite = entry to water vascular system

Tube feet = activated by the water vascular system

38
Q

What does oral side of star fish have (phylum echinodermata )

A

Mouth

Tube feet

39
Q

What does aboral side of star fish have (phylum echinodermata )

A

Madreporite

Dermal gills

bio 1 (16 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions