Lab Exam Bio Flashcards
What are 4 things that affect the tides?
the sun, moon, shapes of bays and estuaries, local weather patterns.
What is a diurnal tide?
has 1 high and 1 low within a 24 hour period
what is a semidiurnal tide?
when there are 2 highs and 2 lows of relatively equal heights within a 24 hour period
what are mixed semi diurnal tides?
when there are 2 highs and 2 lows that have different heights in a 24 hour period
what is geographic north?
geographic North Pole, where earth’s axis of rotation meets surface; static, i.e. does not move
What is magnetic north?
magnetic North Pole, where earths magnetic field points straight down; moves 55-60km/year based on the earths magnetic core.
what is magnetic declination?
the difference of angle between true north and magnetic north. it is measured in degrees.
what is positive declination?
to the east
what is negative declination?
to the west
What is the stage plate?
where you put the specimens on the stage so that you can look at it.
what is the ocular lens/ eyepiece
magnify the specimen (usually 10x); permit binocular viewing
what is a revolving nosepiece?
houses the objectives; used to change from one objective to another
what are the ocular tubes?
the part of the eyepiece that you can move like binoculars
what is the focus knob
there is the coarse focus… which is used to bring the specimen into approximate or near focus.
the fine focus knob is to sharpen the focus quality of the image after it has been brought into focus with the focus knob
what is the diopter ring
its the piece by the eyepiece that twists so that you can adjust the visual of the microscope
what is the condenser?
condenses the light under the stage
what is the objective lenses?
use in conjunction with ocular lenses to further magnify the specimen (magnification of the individual objectives is indicated on each lens)
what is cyanobacteria?
- blue-green bacteria/algae
- prokaryotic
- first evolved photosynthesis
- chlorophyll A
- accessory pigment: red/blue
- most of them are unicellular
- some of them are bioluminesce
they look like… glob chains…
also like beads on a necklace….
what is Prochlorococcus
marine cyanobacteria with unusual pigmentation.
these bacteria belong to the photosynthetic pico plankton. and are one of the most photosynthetic organisms on earth
what are filamentous colonies?
chains of cyanobacteria…
they are usually unicellular. but some species form long chains known as filamentous colonies
What are stromatolites
its a macroscopic structure formed by cyanobacteria –
the oldest fossils on earth .
layered sedimentary formations.
big rocks in the ocean
what is photophores?
bioluminescent things
What are Diatoms?
- phytoplankton
- chlorophyll A and C
- glassy SILICA-containing cell walls
- theres a few different kinds of diatoms.
- 2 valves
look like little glassy boxes, ovals, and triangles.
they can look like fans
or connected squares
What are Dinoflagellates?
- along with diatoms are another major component of the seas’ phytoplankton
- clorophyll A and C
most are unicellular
most have 2 flagella
also have a globular/roundish shape
some are bioluminescent
cell walls are reinforced with cellulose.. e.g. CERATIUM is a type of dinoflagellates that are ‘armoured’. they have 3 spikes
naked dinoflagellates (Noctiluca) lack cell walls.
