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BIOLOGY - algae Test

Enter the letter for the matching Answer
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1.
why are most algae found floating near the surface of fresh and salt water?
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2.
what is responsible for red tide?
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3.
PHAEOPHYTA is?
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4.
almost all entirely marine, they grow in deeper water than other algae.
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5.
true or false: multicellular algae lack true roots, stems, leaves, flowers, fruits, and seeds.
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6.
what do microbes grow on, also found in canned foods and cereals?
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7.
what 3 groups of algae contain seaweed?
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8.
PYRROPHYTA is?
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9.
CHLOROPHYTA is?
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10.
what is a blade?
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11.
what is a hold fast?
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12.
what is a stipe?
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13.
how large can algae grow to be?
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14.
what kingdom do algae belong to?
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15.
define algae.
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16.
what 3 things are a thallus composed of?
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17.
define diatom.
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18.
define plankton.
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19.
CHRYSOPHYTA is?
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20.
how are algae classified?
A.
agar
B.
true
C.
red algae (rhodophyta)
D.
dinoflagellates
E.
1) hold fast 2) stipe 3) blade
F.
autotrophic, contains chrlorophyll A and carry out photosynthesis
G.
a unicellular alga that has a double shell that contains silica
H.
protista
I.
the mass of mostly microscopic organisms that float freely in the waters of aquatic environments
J.
stem-like area, flexible; functions to allow blades to be close to the surface for light absorption
K.
brown algae, its multicellular. 1,500 species; nearly all species are marine, are found on rocky coasts and in cooler waters
L.
green, red, and brown
M.
green algae, its multicellular. 7,000 species exist in this phyla. only a few species are marine, most are freshwater and they range from microscopic up to 8m long, they are similar to greem plants on land. examples: volvox and spirogyra
N.
golden algae, its unicellular. contains 12,000 species and shelled organisms, have a cell wall of silica; example: diatoms, which have 2 identical halves
O.
root-like extension, doesn't nourish a true root
P.
because they require sunlight
Q.
70 meters/230 feet
R.
fire algae, its unicellular. 1,100 species, red colored; make up the ocean's phytoplankton.
S.
leaf-like area, site of sexual reproduction
T.
according to the pigments they contain
Type the Answer that corresponds to the displayed Question.
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21.
most species are freshwater and similar to plants.
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22.
the largest of the algae.
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23.
what is the largest food source of water dwelling organisms?
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24.
makes up the ocean's phytoplankton.
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25.
what of 2 ways do algae reproduce?
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26.
what product is used in foods as a thickening agent?
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27.
what is the largest of the algae?
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28.
what allows the aborption of blue light?
Type the Question that corresponds to the displayed Answer.
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29.
the simple body of a multicellular algae
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30.
red algae, its multicellular. 4,000 species. found in many places, but common in tropical oceans and are almost entirely marine. the colors can range from yellow, reddish-purple, and red. they grow in deeper waters than other algaes.

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