Aquatic & Mosquito- Commercial
Category 5.0 Exam 2025 Questions and
Answers
List the roles plants play in a healthy aquatic ecosystem. - ....ANSWER ...--
Producing oxygen for other organisms
-Preventing shoreline erosion
-Lessening excess nutrients
-Stabilizing the lake bottom
-Providing food/habitat
List ways that excessive plant growth can adversely affect the ecology and uses of a water
body. - ....ANSWER ...--Harms the ecology
-Prevents recreational water use
-Makes drinking water smell/taste bad
-Hampers water treatment operations
-Produces toxins that are harmful to drink
Describe the general growth habits of, means of dispersal, and potential problems
caused by emergent aquatic plants. - ....ANSWER ...-Growth habits: arrowhead,
cattail
…FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 1
,Means of dispersal: underground roots
Problems: purple loosestrife
Describe the general growth habits of, means of dispersal, and potential problems
caused by submerged aquatic plants (both pond weeds and plants with whorled leaves).
- ....ANSWER ...-Growth habits: curly pondweed vs. coontail
Means of dispersal: runners vs. wind/water
Problems: N/A vs. restricts boating and swimming
Describe the general growth habits of, means of dispersal, and potential problems
caused by free-floating and rooted floating-leaved aquatic plants. - ....ANSWER ...-
Growth habits: duckweed vs. pond lily
Means of dispersal: wind vs. roots
Problems: hard to get rid of vs. N/A
Describe the general growth habits of, means of dispersal, and potential problems
caused by free-floating, filamentous, and "rooted" algae. - ....ANSWER ...-Free-
floating: blue-green algae, growth limited by phosphates, release toxic compounds
…FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 2
, Filamentous: anchor themselves to rocks, weeds, etc., long and stringy
Rooted: rooted to bottom with bristly stems and branches, Chara and Nitella
List the advantages and disadvantages of chemical control of aquatic plants and algae. -
....ANSWER ...-(+) Longer lasting control than mechanical
(+) Less physical labor
(+) Costs less
(+) Selective chemical options
(-) Restrictions on water use
(-) Oxygen depletion, sudden release of nutrients
(-) Risk to people, nontarget organisms
Describe the beneficial roles of Wisconsin's fish populations. - ....ANSWER ...--
Fishing for food and sport
-Farms/hatcheries for food, feed, fertilizer, bait, and release into state waters
List five types of situations in which fish control may be warranted. -
....ANSWER ...--Eliminating undesirable/competing fish from rearing ponds
-Removing exotic species
-Thinning stunted fish
-Eliminating fish from a hatchery water supply to prevent disease
…FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 3
Category 5.0 Exam 2025 Questions and
Answers
List the roles plants play in a healthy aquatic ecosystem. - ....ANSWER ...--
Producing oxygen for other organisms
-Preventing shoreline erosion
-Lessening excess nutrients
-Stabilizing the lake bottom
-Providing food/habitat
List ways that excessive plant growth can adversely affect the ecology and uses of a water
body. - ....ANSWER ...--Harms the ecology
-Prevents recreational water use
-Makes drinking water smell/taste bad
-Hampers water treatment operations
-Produces toxins that are harmful to drink
Describe the general growth habits of, means of dispersal, and potential problems
caused by emergent aquatic plants. - ....ANSWER ...-Growth habits: arrowhead,
cattail
…FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 1
,Means of dispersal: underground roots
Problems: purple loosestrife
Describe the general growth habits of, means of dispersal, and potential problems
caused by submerged aquatic plants (both pond weeds and plants with whorled leaves).
- ....ANSWER ...-Growth habits: curly pondweed vs. coontail
Means of dispersal: runners vs. wind/water
Problems: N/A vs. restricts boating and swimming
Describe the general growth habits of, means of dispersal, and potential problems
caused by free-floating and rooted floating-leaved aquatic plants. - ....ANSWER ...-
Growth habits: duckweed vs. pond lily
Means of dispersal: wind vs. roots
Problems: hard to get rid of vs. N/A
Describe the general growth habits of, means of dispersal, and potential problems
caused by free-floating, filamentous, and "rooted" algae. - ....ANSWER ...-Free-
floating: blue-green algae, growth limited by phosphates, release toxic compounds
…FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 2
, Filamentous: anchor themselves to rocks, weeds, etc., long and stringy
Rooted: rooted to bottom with bristly stems and branches, Chara and Nitella
List the advantages and disadvantages of chemical control of aquatic plants and algae. -
....ANSWER ...-(+) Longer lasting control than mechanical
(+) Less physical labor
(+) Costs less
(+) Selective chemical options
(-) Restrictions on water use
(-) Oxygen depletion, sudden release of nutrients
(-) Risk to people, nontarget organisms
Describe the beneficial roles of Wisconsin's fish populations. - ....ANSWER ...--
Fishing for food and sport
-Farms/hatcheries for food, feed, fertilizer, bait, and release into state waters
List five types of situations in which fish control may be warranted. -
....ANSWER ...--Eliminating undesirable/competing fish from rearing ponds
-Removing exotic species
-Thinning stunted fish
-Eliminating fish from a hatchery water supply to prevent disease
…FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 3
