Zoology Lab Practicum #1

Question 1

if the light rays from an object enter the eye at a small angle, than the object will cover a __________ portion of the back of the eye.

Answer 1

smaller

Question 2

the closer you move an object to your eye, the _________ the angle of light from the object entering your eye. Therefore, the object appears to be ___________ .

Answer 2

larger, larger

Question 3

the magnifying lens ________ the angle of light coming from the object viewed. This results in _____________ spread of the image at the back of the eye.

Answer 3

increases, increased

Question 4

which objective lens gives the greatest magnification?

Answer 4

40x

Question 5

which objective lens gives the greatest field of view?

Answer 5

4x

Question 6

what are choanoflagellates

Answer 6

linked to sponges because of their cell type called the choanocyte.

Question 7

How does the paramecium move

Answer 7

the cilia

Question 8

what magnification has the largest depth of focus?

Answer 8

4x

Question 9

what three characteristics define kingdom Animallia?

Answer 9

eukaryotic, multicellular, and heterotrophic

Question 10

function of pseudopodia

Answer 10

locomotion, allowing it to move (amoeba)

Question 11

what kind of reproduction do amoeba use?

Answer 11

binary fission(asexual)

Question 12

what disease do trypanosoma cause and what insect transports it?

Answer 12

African sleeping sickness, tetse fly

Question 13

where are trichonympha found?

Answer 13

in termites

Question 14

what disease is caused by plasmodium?

Answer 14

malaria

Question 15

what are the three classes in phylum Porifera?

Answer 15

Class hexactinellida, calcispongiae, and class demospongiae

Question 16

what is class calcispongae

Answer 16

calcareous sponge

Question 17

what is class hexactenallida made of?

Answer 17

spicules of silicone oxide, is has a hollow inside meaning larger surface area.

Question 18

what is class demospongiae made of?

Answer 18

calcareous, spongin. (feels fluffier)

Question 19

what is the osculum?

Answer 19

osculum is is where water exits

Question 20

what is the ostium?

Answer 20

osmium is where water enters

Question 21

symmetry of sponges?

Answer 21

no symmetry

Question 22

why is the amount of surface area important for each water canal system?

Answer 22

affects efficiency of water flow

Question 23

what four classes are in phylum Cnidaria?

Answer 23

lass anthozoa, class Hydrozoa, class Scyphozoa, class cubazoa

Question 24

class Hydrozoa

Answer 24

gonads occur in the ectoderm tissue. include hydras

Question 25

class anthozoa

Answer 25

sea anemones, coral

Question 26

class Scyphozoa

Answer 26

produces series of budding medusa from a single polyp as part of their reproductive cycle. includes jellyfish.

Question 27

class cubozoa

Answer 27

cube shape to medusa stage, box jellyfish

Question 28

what type of symmetry does phylum cnidaria have?

Answer 28

radial

Question 29

how are phyla cnidaria and ctenophore different in terms of digestive tracts

Answer 29

ctenophore has a complex digestive tract while cnidaria does not.

Question 30

what are statocysts and what are they used for?

Answer 30

sensory organs used for balance while swimming. aquatic invertebrates have them.

Question 31

what type of symmetry is in phylums Platyhelminthes and Nematoda?

Answer 31

bilateral symmetry.

Question 32

what characteristic are similar in Platyhelminthes?

Answer 32

flat bodies, bilateral, flame cells

Question 33

what are flame cells?

Answer 33

cells that eliminate metabolic waste products.

Question 34

how many layers do Platyhelminthes have?

Answer 34

endoderm, mesoderm, ectoderm