Week 7: Lecture 7: Invertebrates: Nematodes

Question 1

Nemato

Answer 1

‘threadlike’

Question 2

Nematodesr

Answer 2

roundworms

Question 3

Phylum nematoda abundance

Answer 3

most abundant group of animals on Earth

Question 4

Symmetry of nematodes

Answer 4

bilateral symmetry

Question 5

Structure of body of nematodes

Answer 5

cylindrical body with tapering ends and a distinct head at the end

Question 6

Body cavities of nematodes

Answer 6

pseudocoelomates

Question 7

Types of lifestyles of nematodes

2

Answer 7

free living species

parasitic

Question 8

Reproduction of nematodes

Answer 8

sexual reproduction with separate sexes

Question 9

Free living nematodes

environment

Answer 9

marine, fresh water and terrestrial

Question 10

Free living nematodes

habitats

Answer 10

found in all habitats!

Question 11

Free living nematodes

function

Answer 11

important in soil nutrient cycling

Question 12

Are free living nematodes pests?

Answer 12

yes, some are

Question 13

What do soil free-living nematodes feed on?

Answer 13

bacteria and fungi

Question 14

Parasitic nematodes

Answer 14

can affect humans

Question 15

Androdioecous species

Answer 15

most individuals are hermaphrodites but males exist (rare) when stressed

Question 16

First multicellular organism to have its genome sequenced

Answer 16

caenorhabditis elegans

Question 17

Nematode’s cuticle

Answer 17

thick external coat which must be shed in order for them to grow