Porifera- Test 5

Question 1

Intvertebrates are animals without a

Answer 1

Backbone

Question 2

Invertebrates make up ___% of all animals

Answer 2

95%

Question 3

Poriferas are the first evolved ___

Answer 3

Intvertebrates

Question 4

Poriferas are commonly referred to as ___

Answer 4

Sponges

Question 5

Poriferas are sessile or motile

Answer 5

Sessile

Question 6

As an adult porifera were _____ to the ___ floor

Answer 6

Anchored , ocean

Question 7

Porifera have few different cells with

Answer 7

Specializations

Question 8

Porifera are _____ feeders

Answer 8

Suspension and filter

Question 9

Most Porifera are

Answer 9

Hermaphrodites

Question 10

Hermaphrodites means

Answer 10

Individual functions both as female and male both produces egg and sperm

Question 11

Poriferas are mostly ___ while some exhibit _____

Answer 11

Asymmetrical while some exhibit radial symmetry

Question 12

Poriferas are acoelomates true or false

Answer 12

True

Question 13

Describe 3 traits of acoelomates

Answer 13

• do not possess a body cavity
• do not have any true body system
• however do have specialized cells

Question 14

Porifera were considered the earliest ____ life

Answer 14

Multicellular

Question 15

Porifera provides info on the earliest life forms in term of _____

Answer 15

“Blueprints”

Question 16

Name the 3 classes

Answer 16

Calcarea, hezactinellida, demospongiae

Question 17

Describe the class calcarea *4

Answer 17

CaCO3 skeleton
Entirely marine
Dullcolour
<4mm

Question 18

Describe the class hexactinllida *2

Answer 18

Skeleton made from glass their six rayed spicules

Are made of silicon

Question 19

Class demospongiae *4

Answer 19

90% of all sponges

Largest and brightly colour

Includes bath sponges

Includes 150 fresh water species