B4.2 Ecological Niches

In holozoic nutrition, organisms ______ food and utilize it.

• ingest

• excrete

• ferment

• oxidize

What is a well-known freshwater protist that exhibits mixotrophic nutrition?

• Euglena

• Algae

• Bacteria

• Fungi

Which mode of nutrition is used by decomposer detritivores?

• Photosynthesis

• Holozoic nutrition

• Mixotrophic nutrition

• Saprotrophic nutrition

Gorillas are primarily ________.

• Carnivores

• Herbivores

• Omnivores

• Insectivores

Herbivorous vertebrates like cows and sheep have molars that are ______.

• Sharp and pointed

• Broad and flat

• Small and round

• Long and narrow

In the rumen, the food is softened and partially broken down by ______.

• Enzymes

• Microbes

• Acids

• Water

What chemical does poison ivy produce that causes allergic reactions?

• Digoxin

• Urushiol

• Phytotoxin

• Secondary compounds

Fill in the blank: _______ is used to treat heart failure and is extracted from foxgloves.

• Urushiol

• Digoxin

• Phytotoxins

• Secondary compounds

Which of the following organisms is known for its saprotrophic mode of nutrition?

• Fungi

• Algae

• Protozoa

• Plants

What is the primary function of the rumen in ruminant animals?

• Absorb nutrients

• Store food

• Break down cellulose

• Produce bile