Practical 2

Question 1

Porifera example

Answer 1

Sponges

Question 2

Porifera characteristics

Answer 2

• asymmetrical
• adults are non mobile
• filter feeders
• diploblastic
• not protostome or deuterostome

Question 3

cnidaria example

Answer 3

jellyfish

Question 4

cnidaria characteristics

Answer 4

• radially symmetrical
• aquatic
• active predator
• diploblastic
• not protostome or deuterostome

Question 5

platyhelminths example

Answer 5

flatworms

Question 6

platyhelminths characteristics

Answer 6

• bilaterally symmetrical
• cephalized
• mostly parasitic
• protostomes
• triploblastic

Question 7

mollusca example

Answer 7

snails

Question 8

mollusca characteristics

Answer 8

• bilaterally symmetrical
• protostomes
• triploblastic

Question 9

annelida example

Answer 9

earthworm

Question 10

annelida characteristic

Answer 10

• bilaterally symmetrical
• cephalized
• protostomes
• triploblastic
• soil decomposers or parasites

Question 11

echinodermata example

Answer 11

sea star

Question 12

echinodermata characteristics

Answer 12

• adults are radially symmetrical
• larvae are bilaterally symmetrical
• deuterostomes
• triploblastic

Question 13

chordata example

Answer 13

humans

Question 14

chordata characteristics

Answer 14

• bilaterally symmetrical
• cephalized
• has notochord
• deuterostomes
• triploblastic

Question 15

general cell division

Answer 15

mitosis

Question 16

differentation

Answer 16

cells, tissues, and organs become specialized for a particular function

Question 17

morphogenesis

Answer 17

development of animals shape

Question 18

fertilization

Answer 18

union of male and female gametes to form zygote

Question 19

cleavage

Answer 19

makes multicellular morula and blastula

Question 20

gastrulation

Answer 20

forms gastrula

Question 21

endoderm

Answer 21

forms gut

Question 22

mesoderm

Answer 22

lines body cavity interior

Question 23

ectoderm

Answer 23

forms body covering

Question 24

neurulation

Answer 24

forms nervous system

Question 25

organogenesis

Answer 25

develops organs

Question 26

General systems animals need

Answer 26

Red: Reproduction Grapes: Gas exchange So: Sensing the environment Done: Digestive system

Question 27

Convergent evolution

Answer 27

two species with different ancestors have similar characteristics

Question 28

divergent evolution

Answer 28

two species with same common ancestor have different characteristics

Question 29

why is "worm" not a good taxonomic distinction

Answer 29

no b/c it is a term to describe a frequent body plan that is anything tube-like

Question 30

notochord

Answer 30

a dorsal supporting rod that may be replaced by a vertebral column in some groups.

Question 31

hollow dorsal nerve chord

Answer 31

forms brain and spinal cord in some groups

Question 32

pharyngeal slits

Answer 32

opening from pharynx

Question 33

post anal tail

Answer 33

extension of body beyond the anus