animals

Question 1

for each phylum give an animal in order of complexity

Answer 1

PORIFERA, sponge
CNIDARIA, jellyfish
PLATYHELMINTHES, tapeworm
NEMATODA, hook worm
ANNELIDA, leach
MOLLUSCA, snails
ARTHROPODA, spider
ECHINODERMS, starfish
CHORDATA, dog

Question 2

difference between phylum chordata and invertebrates

Answer 2

invertebrates lack a backbone, chordata have a backbone

Question 3

characteristics all chordata have

Answer 3

have a notochord, dorsal nerve, bilateral symmetry, coelomates, gill slits, post anal tail

Question 4

difference between invertebrate and vertebrate chordates

Answer 4

invertebrates have a flexible notochord, are the middle ground between invertebrates and vertebrates
chordates have a notochord made up of bone called verta

Question 5

what is the simplest typed of vertebrate and its characteristics

Answer 5

AGNATHA, no jaw, skeleton made of cartilage, uncovered gill slits, 2 chambered heart, ectothermic, external fertilization

Question 6

what class began ton have jaws, paired fins

Answer 6

CHONDRICHTHYES, like sharks began obtain these traits and share similar traits with agnatha

Question 7

what class began to have bones and covered gill slits

Answer 7

OSTEICHTHYES, began to have skeleton composed of bone, have covered gills to remain still in water, also have swim bladder

Question 8

what class undergoes metamorphisis give some extra details

Answer 8

AMPHIBIA, live double lives are birthed in water and have gills later grow limbs and obtain lungs, and have 3 chambered heart but are still ectothermic, lose of scales

Question 9

what class began amniotic egg

Answer 9

REPTILLIA,, have dry scaly skin, reproduce internally and produce protective amniotic egg

Question 10

what class introduces a 4 chambered heart

Answer 10

AVES, are now endothermic, have large sternum to fly and porous bones to make them lighter to fly, scales have been rreplaced with feathers, have airsacs in lungs for continuous supply

Question 11

what class has internal fertilization and embryo development

Answer 11

MAMMALIA, reproduce completely internally, covered in hair or fur, sweat glans to regulate body heat, mammary glands to feed young

Question 12

what are the three types of mammals

Answer 12

MONODERMS, external hatching of eggs
MARSUPIALS, offspring develops in mother pouch
PLACENTALS, placenta provides nutrients to baby untill embryo is miniature adult

Question 13

differences between the worm like

Answer 13

flat worms and segmented are hermaphroditic and round are not
flat worms are parasitic the others are not
flat worms have 1 opening others have 2
segmented have a circulatory system

Question 14

what are the two forms of cnidaria

Answer 14

polyp mouth up
medusa mouth down
first animals with tissues, and symetrical

Question 15

why is porifera so simple

Answer 15

they have no organs or tissue, just complex bundle of specialized cells, they don’t move, filter feeders

Question 16

two types of animal behaviour define and give examples

Answer 16

INSTINCTS, anything you have from day one, genetically programmed to do it ex. grasping reflex of a baby or hognose snake spitting and playing dead
OBSERVATIONAL LEARNING, watching another organisms do a task or skill and then mimic or copy what its doing
ex. octopus can watch another octopus open a jar and the be able to do
human sticks out tongue and then a monkey will