Zoology Lab Practicum #1 Flashcards
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.
smaller
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 ___________ .
larger, larger
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.
increases, increased
which objective lens gives the greatest magnification?
40x
which objective lens gives the greatest field of view?
4x
what are choanoflagellates
linked to sponges because of their cell type called the choanocyte.
How does the paramecium move
the cilia
what magnification has the largest depth of focus?
4x
what three characteristics define kingdom Animallia?
eukaryotic, multicellular, and heterotrophic
function of pseudopodia
locomotion, allowing it to move (amoeba)
what kind of reproduction do amoeba use?
binary fission(asexual)
what disease do trypanosoma cause and what insect transports it?
African sleeping sickness, tetse fly
where are trichonympha found?
in termites
what disease is caused by plasmodium?
malaria
what are the three classes in phylum Porifera?
Class hexactinellida, calcispongiae, and class demospongiae
what is class calcispongae
calcareous sponge
what is class hexactenallida made of?
spicules of silicone oxide, is has a hollow inside meaning larger surface area.
what is class demospongiae made of?
calcareous, spongin. (feels fluffier)
what is the osculum?
osculum is is where water exits
what is the ostium?
osmium is where water enters
symmetry of sponges?
no symmetry
why is the amount of surface area important for each water canal system?
affects efficiency of water flow
what four classes are in phylum Cnidaria?
lass anthozoa, class Hydrozoa, class Scyphozoa, class cubazoa
class Hydrozoa
gonads occur in the ectoderm tissue. include hydras
class anthozoa
sea anemones, coral
class Scyphozoa
produces series of budding medusa from a single polyp as part of their reproductive cycle. includes jellyfish.
class cubozoa
cube shape to medusa stage, box jellyfish
what type of symmetry does phylum cnidaria have?
radial
how are phyla cnidaria and ctenophore different in terms of digestive tracts
ctenophore has a complex digestive tract while cnidaria does not.
what are statocysts and what are they used for?
sensory organs used for balance while swimming. aquatic invertebrates have them.
what type of symmetry is in phylums Platyhelminthes and Nematoda?
bilateral symmetry.
what characteristic are similar in Platyhelminthes?
flat bodies, bilateral, flame cells
what are flame cells?
cells that eliminate metabolic waste products.
how many layers do Platyhelminthes have?
endoderm, mesoderm, ectoderm
