Pseudocolomate Taxonomy, generals, pyhlums and rotifers

Question 1

What are the 4 phylums of Pseudocoelomates?

Answer 1

Rotifera, Acanthocephala, Nematoda, Tardigrada

Question 2

What are the 5 groups of the Phylum Nematoda?

Answer 2

Ascaris lumbricoids, Hookworms, Trichina worms, pinworms, filarial worms.

Question 3

What is a a pseudocoel?

Answer 3

A body cavity that is not surrounded COMPLETELEY by the mesoderm.

Question 4

What is a pseudocoel alternatively?

Answer 4

a persistent blastocoel and lacks a peritoneum (membrane that lines abdominal cavity)

Question 5

What is the function of a pseudocoel? (4 of them)

Answer 5

1. Acts as hydrostatic skeleton
   2.provides storage area for waste materials
2. permits internal circulation
3. Simpler to distribute materials throughout the body

Question 6

What pseudocoelomate phylum does NOT have a complete gut?

Answer 6

Acanthocephala

Question 7

What are the two development terms all pseudocoelomates are?

Answer 7

Triploblastic and Protostomes.

Question 8

What are Rotifers named after?

Answer 8

Corona or cillated crown that looks like a spinning wheel when it beats. Roti = wheel fera = one that bears.

Question 9

Habitat of Rotifers

Answer 9

Most are Benthic (live in bottom) and freshwater.

Question 10

Corona:

Answer 10

ciliated crown that functions in feeding and locomotion

Question 11

Sensory bristles aka

Answer 11

papillae

Question 12

Do rotifers have a mouth, visceral organs, and sensory antennae?

Answer 12

Yes

Question 13

Mastax -

Answer 13

modified phraynx

Question 14

Trophi

Answer 14

hard jaws of muscular portion for sucking in and grinding food

Question 15

What is the function of flame cells?

Answer 15

Osmoregulation and excretion of wastes

Question 16

Bladder does what?

Answer 16

empties into cloaca along with oviducts

Question 17

What is weird about Bdelloids specifically?

Answer 17

No males or hermaphrodites, only parthogenic females…weird for how old it has been along for.

Question 18

Are rotifers Dioceious (Male or Female)

Answer 18

Yes

Question 19

What is abnormal about female rotifers

Answer 19

Asexual or sexual reprodction choices they lay two kinds of eggs 1N and 2N.

Question 20

Diploid amictic eggs develop into what

Answer 20

2N diploid females through mitosis via parthogenesis

Question 21

unfertilized haploid 1Neggs develop into what?

Answer 21

Haploid males 1N

Question 22

fertilized haploid eggs develop into?

Answer 22

“winter eggs” develop into amictic females.