Question 1

The body of an alga is termed the ________.

Accepted Answer

The answer of The body of an alga is termed...

Question 2

Algal blooms are triggered by which of the following?

Accepted Answer

Algal blooms are triggered by nutrient enrichment, particularly an excess of phosphorus and nitrogen. This excess of nutrients can come from sources such as fertilizer runoff, sewage, and agricultural waste.

Question 3

Agar is derived from ________ ________ and is used as a growth medium for microorganisms.

Accepted Answer

The answer of Agar is derived from ________ ________ and...

Question 4

Which of the following is a neurotoxin produced by members of the Cyanobacteria?

Accepted Answer

Anatoxin-a is a neurotoxin produced by certain species of Cyanobacteria, also known as blue-green algae. It can cause paralysis or death in animals and humans that come into contact with it.

Question 5

Agar and carrageenan are examples of chemicals called ________ which are used as emulsifiers,stabilizers,and gelling agents.

Accepted Answer

The answer of Agar and carrageenan are examples of chemicals...

Question 6

In Fucus,the swollen areas at the ends of the blade are reproductive regions known as ________.

Accepted Answer

The answer of In Fucus,the swollen areas at the ends...

Question 7

________ ________ is a product derived from the brown algae that imparts a smooth texture in both foods like icings and puddings and in industrial products like paints and hand lotions.

Accepted Answer

The answer of ________ ________ is a product derived from...

Question 8

Ciguatera poisoning is due to activities of which of the following?

Accepted Answer

Ciguatera poisoning is caused by toxins produced by certain species of dinoflagellates, which accumulate in fish that feed on these algae. Humans can become poisoned by consuming these fish.

Question 9

________ ________ can be used as soil additive since it can act like a field of broken glass to discourage some microscopic garden pests.

Accepted Answer

The answer of ________ ________ can be used as soil...

Question 10

Which group of algae can be differentiated into a holdfast,stipe,and blade?

Accepted Answer

Brown algae, such as kelp, have a complex thallus that includes a holdfast for anchorage, a stipe for support, and a leaf-like blade for photosynthesis. This differentiation of structures is not seen in cyanobacteria, dinoflagellates, green algae, or red algae.

Question 11

________ have virtually indestructible shells of glass which have been used industrially for their polishing,filtering,and reflective properties.

Accepted Answer

The answer of ________ have virtually indestructible shells of glass...

Question 12

Which of the following is not a contributing factor to the success of Caulerpa taxifolia?

Accepted Answer

Caulerpa taxifolia primarily reproduces asexually, through fragmentation, rather than relying on an elaborate sexual reproduction strategy. This characteristic allows it to spread rapidly in non-native environments.

Question 13

Algal blooms may affect which of the following?

Accepted Answer

Algal blooms can release toxins into the water that can affect the quality of drinking water. Additionally, fish and shellfish can accumulate these toxins, making them unsafe for consumption. Algal blooms can also decrease oxygen levels in the water, which can harm aquatic birds and other organisms that rely on oxygen-rich water for reproduction and survival. Therefore, all of the above options can be affected by algal blooms.

Question 14

Unlike land plants,algae lack true tissue differentiation.

Accepted Answer

Algae lack true tissue differentiation, which is a characteristic of land plants. Algae are considered primitive plants and are primarily aquatic.

Question 15

Which of the following is not correct?

Accepted Answer

Fucoidan is not used to treat chemical addiction in humans, but rather it has been shown to have anti-cancer and anti-inflammatory properties.

Question 16

Diatoms with bilateral symmetry are known as ________ diatoms.

Accepted Answer

The answer of Diatoms with bilateral symmetry are known as...

Question 17

Instead of a rigid cell wall,a proteinaceous pellicle occurs on organisms in the Division ________.

Accepted Answer

Euglenophyta are unicellular protists that lack a rigid cell wall and instead have a proteinaceous pellicle to maintain cell shape and protect against osmotic pressure changes.

Question 18

The unicellular algae that cause "Red Tides" are known as ________.

Accepted Answer

The answer of The unicellular algae that cause "Red Tides"...

Question 19

How is Caulerpa taxifolia and other siphonous algae different from typical green algae?

Accepted Answer

Caulerpa taxifolia and other siphonous algae are coenocytic, meaning they are made up of multinucleated cells that share a common cytoplasm. They also have a stolon, a stem-like structure that connects different parts of the alga. These features are not seen in typical green algae, which are multicellular and have distinct cell walls between individual cells.

Question 20

The unicellular algae that cause "red tides" belong to the Division ________.

Accepted Answer

Red tide is caused by unicellular algae known as dinoflagellates, which belong to the Division Dinophyta.

Quiz 22: The Algae