Introducing the Deuterostomes - Echnioderms and Chordates Flashcards Preview

Bio 111 > Introducing the Deuterostomes - Echnioderms and Chordates > Flashcards

Flashcards in Introducing the Deuterostomes - Echnioderms and Chordates Deck (45)
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1

In Protostomes the blastopore develops into the...

mouth

2

In Deuterostomes the blastopore develops into the...

anus

3

The circulatory system of Deuterostomes have a

ventral heart

4

The central nervous system of Deuterostomes is

dorsal

5

The hard skeleton of Deuterostomes is

internal

6

Echnioderms aka

"spiny skin"

7

Where do Echinoderms live?

marine environments

8

What is the endoskeleton of Echnioderms composed of?

CaCo3

9

what kind of symmetry do Echinoderms have?

pentaradial symmetry - only found in adults

10

what kind of symmetry do larvae Echinoderms have?

bilaterally symmetry

11

How do Echnioderms change their symmetry

metamorphosim

12

how many adhesive arms and suckers do intermediate larval stage grow?

3

13

how long does it take for a starfish to transform from an egg to a newly formed starfish?

2 months

14

what species of Deuterostomes have been here since Cambrian era?

Priapulids

15

The ventral side of a starfish is the

oral side

16

what do starfish have in each of their arms?

organs

17

Synapormorpy is ...

a characteristic that only one group has evolved into

18

what is a synapormorpholgic characteristic of the starfish?

water vascular system

19

What is the water vascular system used for?

locomotion, feeding, excretion, gas exchange

20

How do starfish reproduce?

external fertilization

21

whats the problem with the external fertilization of starfish?

release gametes into the atmosphere and to try and find the right partner - broadcast spawning

22

How do starfish reproduce?

Regeneration

23

Regeneration

arm can be dropped and regenerated as a way to ...
- escape predation
- decreases the chance of infection
- reproduce

24

How do starfish reproduce?

Parthenogensis

25

Parthenogensis

development of an unfertilized eff

26

How can parthenogensis be induced artificially in sea urchins?

by exposing the eggs to the appropriate salt solution

27

Example of crinoidea

sea lilies and feather stars

28

examples of ophiuroidea

brittle stars and basket stars

29

Example of Asteroidea

sea stars

30

Example of Enchinoidea

Sea urchins and sand dollars