Which of the following is an example of symbiotic mutualism?
a zooflagellate digesting food in a termite’s intestine
the zooflagellate Giardia reproducing in a human
two paramecia exchanging genetic material
the sporozoan Plasmodium feeding on a human cell
The correct answer is the zooflagellate digesting food in a termite's intestine. Symbiotic mutualism is a type of symbiotic relationship in which both organisms benefit from each other. In this case, the termite benefits from the digestion of food by the zooflagellate, while the zooflagellate benefits from the supply of food provided by the termite's intestine.
What do yeast cells use as a food source in breadmaking and winemaking?
carbon dioxide
alcohol
salt
sugar
Yeast cells use sugar as a food source in breadmaking and winemaking. During fermentation, yeast breaks down sugar molecules into carbon dioxide and alcohol, resulting in the rising of bread dough and the production of alcohol in the case of winemaking.
An amoeba moves and feeds by forming temporary bulges of the cell membrane called _____.
oral grooves
cilia
pseudopods
contractile vacuoles
The correct answer is pseudopods. An amoeba moves and feeds by extending temporary bulges of its cell membrane called pseudopods. These pseudopods allow the amoeba to change its shape and move in a crawling-like motion. They also help the amoeba capture and engulf food particles.
What animal-like characteristic do euglenoids have?
They are autotrophs.
They have a flagellum.
They have light-sensitive pigments.
They can sometimes be heterotrophs.
The correct answer is that euglenoids have a flagellum. A flagellum is a whip-like structure that extends from the cell and allows the euglenoid to move. Euglenoids are a group of protists that can be both autotrophs (capable of photosynthesis) and heterotrophs (able to absorb nutrients from their environment). They can also have light-sensitive pigments to help them detect and respond to light. However, the characteristic that all euglenoids have in common is the presence of a flagellum.
A fungus that is a parasite might feed on a _____.
slice of bread
dead tree
wet bathroom tile
person’s skin
A fungus that is a parasite might feed on a person's skin. Fungal parasites can cause various skin infections or diseases in humans, such as athlete's foot or ringworm. These fungi extract nutrients and energy from the human skin, causing harm and discomfort to the person. While there are fungi that can feed on dead trees or other organic matter, a fungus that is a parasite specifically targets living organisms for its nutrition.
Which describes funguslike protists?
They are all able to move at some point.
They are all autotrophs.
Their cells do not have cell walls.
Their pseudopods allow them to reproduce.