Which statement best describes respiration in spiral-shaped bacteria?(1 point)

Question

Responses

Spiral-shaped bacteria only utilize aerobic respiration.
Spiral-shaped bacteria only utilize aerobic respiration.

Spiral-shaped bacteria only utilize anaerobic respiration.
Spiral-shaped bacteria only utilize anaerobic respiration.

Spiral-shaped bacteria are facultative anaerobes but can switch to aerobic respiration when needed.
Spiral-shaped bacteria are facultative anaerobes but can switch to aerobic respiration when needed.

Spiral-shaped bacteria are generally aerobic, but a subset of the group uses anaerobic respiration.
Spiral-shaped bacteria are generally aerobic, but a subset of the group uses anaerobic respiration.

Answer 1

The statement that best describes respiration in spiral-shaped bacteria is:

Spiral-shaped bacteria are generally aerobic, but a subset of the group uses anaerobic respiration.

This recognizes that while many spiral-shaped bacteria, such as those in the genus Spirillum, are typically aerobic, there are also anaerobic species within this group.

Answer 2

Your teacher gives you an unknown bacterium to observe. Select the method that would help you determine whether the bacterium is a chemotroph.(1 point)
Responses

growing the bacterium in an agar tube filled with protein to see if it breaks the organic molecules down
growing the bacterium in an agar tube filled with protein to see if it breaks the organic molecules down

growing the bacterium in a sulfur solution to see if it breaks the inorganic molecules down
growing the bacterium in a sulfur solution to see if it breaks the inorganic molecules down

exposing the bacterium to direct sunlight to see if it converts light to chemical energy
exposing the bacterium to direct sunlight to see if it converts light to chemical energy

exposing the bacterium to carbon dioxide to see if it fixes carbon

Answer 3

To determine whether the unknown bacterium is a chemotroph, the best method would be:

growing the bacterium in an agar tube filled with protein to see if it breaks the organic molecules down.

Chemotrophs obtain energy by oxidizing organic or inorganic molecules, so testing its ability to break down proteins (organic molecules) would help identify if it is a chemotroph.

Answer 4

Which statement is most accurate regarding bacteria reproduction?(1 point)
Responses

When conditions are ideal, bacteria can reproduce by fission at very high rates in a short period of time.
When conditions are ideal, bacteria can reproduce by fission at very high rates in a short period of time.

When conditions are poor, bacteria can easily adjust and reproduce in the new environment.
When conditions are poor, bacteria can easily adjust and reproduce in the new environment.

When conditions are poor, all bacteria form endospores that activate when conditions improve.
When conditions are poor, all bacteria form endospores that activate when conditions improve.

When conditions are ideal, all bacteria reproduce by fission at the same rate over a similar period of time.

Answer 5

The most accurate statement regarding bacteria reproduction is:

When conditions are ideal, bacteria can reproduce by fission at very high rates in a short period of time.

This accurately reflects the ability of bacteria to reproduce rapidly through binary fission when environmental conditions are favorable.

Answer 6

You discover an unknown protist. A section breaks off from the main protist specimen, and this piece develops into an adult protist. Select the type of reproduction your specimen underwent and the name of this particular process.(1 point)
Responses

asexual reproduction; budding
asexual reproduction; budding

sexual reproduction; fission
sexual reproduction; fission

asexual reproduction; fragmentation
asexual reproduction; fragmentation

sexual reproduction; conjugation

Answer 7

The type of reproduction your specimen underwent is:

asexual reproduction; fragmentation.

In this process, a portion of the organism breaks off and develops into a new individual, which is characteristic of fragmentation.

Answer 8

Your teacher gives you an unknown protist to classify that is currently inactive. The protist appears to have long lash-like appendages protruding from its cell surface. Which kind of locomotion can we expect from this protist?(1 point)
Responses

The appendages of this protist will move in a dragging motion that actively pulls the protist forward.
The appendages of this protist will move in a dragging motion that actively pulls the protist forward.

The appendages of this protist are not functional, and the protist moves passively via environmental forces.
The appendages of this protist are not functional, and the protist moves passively via environmental forces.

The appendages of this protist will move back and forth like a wagging tail to actively propel the protist forward.
The appendages of this protist will move back and forth like a wagging tail to actively propel the protist forward.

The appendages of this protist will move in a sweeping motion like oars to actively propel the protist forward.
The appendages of this protist will move in a sweeping motion like oars to actively propel the protist forward.

Answer 9

The kind of locomotion we can expect from this protist, which has long lash-like appendages, is:

The appendages of this protist will move back and forth like a wagging tail to actively propel the protist forward.

The description of "long lash-like appendages" suggests the presence of flagella, which typically move in a whip-like motion to propel the organism.