Nematoda

Question 1

nematodes belong to the group ______

Answer 1

Ecdysozoans

Question 2

what defines the Ecdysozoans

Answer 2

the molecular evidence

Question 3

what covers members of the Ecdysozoans

Answer 3

cuticle

Question 4

synapomorphy for Ecdysozoans

Answer 4

ecdysis AKA moulting

Question 5

how do members of Ecdysozoan get bigger

Answer 5

by ecdysis or moulting of their cuticle

Question 6

least to most inclusive

Answer 6

Nematoda: Ecdysozoans: Bilaterian: Eumetazoan: Metazoan

Question 7

how can one describe Ecdysozoans in terms of their species

Answer 7

it’s the most species rich (mainly because of the insects)

Question 8

what is one reason for the huge diversity in Ecdysozoans

Answer 8

niche proliferation (they can access a wide range of ecological niches that other animal cannot)

Question 9

Nematoda AKA

Answer 9

roundworms

Question 10

two traits that CONTRAST Nematodes from Annelids

Answer 10

1. they lack segmented bodies
2. they lack circular muscles

Question 11

what type of canal do nematodes have

Answer 11

alimentary (2 holes)

Question 12

what do nematodes lack

Answer 12

a circulatory system

Question 13

reproduction in nematodes

Answer 13

usually sexual via internal fertilization

Question 14

are most nematodes diecious or hermaphroditic

Answer 14

diecious

Question 15

why do nematode zygotes survive well

Answer 15

they are resistant to severe environmental conditions

Question 16

is a cuticle the same thing as an exoskeleton

Answer 16

NO

Question 17

how do nematodes facilitate growth

Answer 17

they periodically shed their cuticle and secrete a larger one

Question 18

where do free-living nematodes live

Answer 18

aquatic or soil habitats

Question 19

where do parasitic nematodes live

Answer 19

moist tissue of plants OR body fluids and tissues of animals

Question 20

importance of nematodes

Answer 20

1. decomposition
2. nutrient cycling

Question 21

true or false
most animals and plants have nematode parasites

Answer 21

YES

Question 22

why are nematodes so good at parasites

Answer 22

they have an incredible molecular warfare that allows them to act as viruses