QUIZZES

Question 1

what is the psychological reason why the body sizes of organisms such as planarians and flukes are limited?

Answer 1

they dont have a acoelom.

Question 2

what is the function of the followin g body structures?
pharynx,protonephridia

Answer 2

pharynx-feeding
protonephridia-excretion

Question 3

difference between open and closed circulatory system

Answer 3

open is free flowing blood
closed has blood vessels, veins, tubes to transfer blood

Question 4

what circulatory system is in annaleids

Answer 4

closed

Question 5

what circulatory system is in mollusks

Answer 5

open

Question 6

function of crop

Answer 6

stomach for annalids. stores rocks

Question 7

function of gizzard

Answer 7

grind the food

Question 8

function of gizzard

Answer 8

how they crush food

Question 9

function ofparapodia

Answer 9

help with movement

Question 10

function of clitellum

Answer 10

fatty band around worm. helps with reproduction. exchange egg and sperm.

Question 11

function of nephridia

Answer 11

excretion

Question 12

name 2 evolutionary reversals for most species in the class bivalvia

Answer 12

no head, cephalization, no radula

Question 13

what are many species in the class bivalvia considered economically important.

Answer 13

they are an importsant food source

Question 14

breifly explain why leeches can be used as benefit for modern western medecine

Answer 14

leeches saliva can help with blood clots

Question 15

which class of mollusks demonstrate advanced cognition and the ability to solve puzzles

Answer 15

cephalapeda

Question 16

a feeding structure found in many mollusks. can be used to scrape food from hard surfaces

Answer 16

radula

Question 17

animals are thought to. have evolved from colonial animal like protists known as

Answer 17

choanoflagallates

Question 18

2 most ancestral animals phyla

Answer 18

pnidaria, proifera

Question 19

name 2 characteristiucs that all animals have

Answer 19

dna and lipids

Question 20

bilateral symmetry

Answer 20

one plane of symmetry

Question 21

radial symmetry

Answer 21

many planes of symmetry

Question 22

example of radial symmetry is

Answer 22

jellyfish

Question 23

most diverse group of animals

Answer 23

arthropods

Question 24

evolutionary trend cephalization

Answer 24

senseory structures and nervous structures evolve towards anterior part of body

Question 25

the entrance to the gastrula is

Answer 25

blastopore

Question 26

blastopore becomes ___ in protostome animals

Answer 26

mouth

Question 27

blastopore becomes ___ in deuterostome animals

Answer 27

anus

Question 28

which germ layer is responsible for muscles

Answer 28

mesoderm

Question 29

which germ layer is responsible for outside of skin

Answer 29

ectoderm

Question 30

what is the ceolom

Answer 30

empty air filled/fluid filled space the seperates organs. prevents injury

Question 31

if lacking coelom what constraint occurs on size

Answer 31

cant grow vertically but can grow longer