Algae

Question 1

described as photoautotrophs that lack the roots and stems of plants

Answer 1

ALGAE

Question 2

Much of the world’s petroleum was formed from ____ and other ________ organisms that lived several million years ago.

Answer 2

diatoms, planktonic

Question 3

The body of a multicellular alga

Answer 3

thallus

Question 4

anchors the alga to a rock

Answer 4

Holdfasts

Question 5

stem-like and often hollow

Answer 5

Stipes

Question 6

a floating, gas-filled bladder found on brown seaweed

Answer 6

pneumatocyst

Question 7

a (a light-trapping pigment) and accessory pigments involved in photosynthesis are responsible for the distinctive colors of many algae

Answer 7

Chlorophyll

Question 8

Most algae are photosynthetic; except for the fungal-like algae called

Answer 8

Oomycotes, which are chemoheterotrophs

Question 9

a thickener used in many foods (such as ice cream and cake decorations), stabilizer, and emulsifier

Answer 9

ALGIN

Question 10

a brown algae that induce vaginal dilation before surgical entry into the uterus through the vagina

Answer 10

Laminaria japonica

Question 11

the kelp’s storage material made of
carbohydrates which is extracted from their cell wall

Answer 11

ALGIN

Question 12

encourage suspension of one liquid in another, similarly in the mixture of oil and water

Answer 12

Emulsifier

Question 13

Delicately branched thalli and can live at greater ocean depths than other algae due to the red pigments that allow them to absorb blue light

Answer 13

Red algae

Question 14

Agar used in many microbiological media is from?

Answer 14

Red algae

Question 15

a gelatinous material that comes from Irish moss.

Answer 15

CARRAGEENAN

Question 16

Where does carrageenan come from?

Answer 16

Irish moss

Question 17

thickening agent in evaporated milk
ice cream, and pharmaceutical agents.

Answer 17

AGAR and CARRAGEENAN

Question 18

algae with cellulose cell walls containing chlorophyll A and B, and store starch, as plants do

Answer 18

Green algae

Question 19

It is yellow-green in color and is known as accessory pigment as it absorbs energy of different wavelengths and transfer it by resonance to chlorophyll-a.

Answer 19

Chlorophyll B

Question 20

It is blue-green in color and is known as essential pigment for it can absorb and convert light energy into chemical energy

Answer 20

Chlorophyll A

Question 21

Unicellular or filamentous algae with complex cell walls that consist of pectin and a layer of silica

Answer 21

DIATOMS

Question 22

Diatoms store energy captured through photosynthesis in the form of ?

Answer 22

oil

Question 23

It is produced by diatom causing mussel poisoning leading to outbreak of a neurological disease in Canada

Answer 23

Domoic acid toxin

Question 24

Unicellular algae collectively called plankton, or free-floating organisms.

Answer 24

DINOFLAGELLATES

Question 25

the algae trapped in the gills of the fish that release a neurotoxin that stops the fish from breathing.

Answer 25

Karenia brevis

Question 26

It produces **saxitoxin** that causes paralytic shellfish poisoning.

Answer 26

***Alexandrium (genus)***

Question 27

a toxin that causes paralytic shellfish poisoning.

Answer 27

**saxitoxin**

Question 28

a potentially fatal syndrome resulting from the ingestion of one or more of a family of potent neurotoxins called saxitoxins

Answer 28

**Paralytic shellfish poisoning (PSP)**

Question 29

Gives the ocean a deep red color thus the name RED TIDE originates

Answer 29

DINOFLAGELLATES | ***Alexandrium (genus)*** or ***Karenia brevis***

Question 30

responsible for periodic massive fish deaths along the Atlantic Coast.

Answer 30

Pfiesteria

Question 31

an illness caused by eating fish that contain toxins produced by a marine microalgae called Gambierdiscus toxicus

Answer 31

Ciguatera fish poisoning (or ciguatera)

Question 32

Ciguatera fish poisoning (or ciguatera) is an illness caused by eating fish that contain toxins produced by a marine microalgae called

Answer 32

Gambierdiscus toxicus

Question 33

Decomposers that form the cottony masses on dead algae and animals, usually in fresh water

Answer 33

WATER MOLDS/OOMYCOTA

Question 34

spores of oomycote, has two flagella

Answer 34

Zoospores

Question 35

infects soy beans, potato, and cocoa

Answer 35

Phytophthora