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

Question

Responses

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

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.
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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 acknowledges the diversity within spiral-shaped bacteria, many of which are aerobic (like Spirillum), while others are capable of anaerobic respiration.

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

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
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Answer 3

To determine whether the unknown bacterium is a chemotroph, the most appropriate method is:

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

Chemotrophs obtain energy by breaking down organic or inorganic molecules, so observing if the bacterium can break down protein (an organic molecule) would help identify its metabolic strategy.

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 ideal, all bacteria reproduce by fission at the same rate over a similar period of time.
When conditions are ideal, all bacteria reproduce by fission at the same rate over a similar 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.
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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 statement correctly describes the asexual reproduction process of binary fission in bacteria, which allows them to multiply rapidly under favorable conditions. The other statements are not accurate as they generalize or misrepresent bacterial responses to environmental conditions.

Answer 6

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

sexual reproduction; conjugation
sexual reproduction; conjugation

asexual reproduction; budding
asexual reproduction; budding

asexual reproduction; fragmentation
asexual reproduction; fragmentation

sexual reproduction; fission
sexual reproduction; fission
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Answer 7

The correct answer is:

asexual reproduction; fragmentation.

In this case, the section that broke off from the main protist specimen developing into an adult protist indicates that the process involved a piece of the organism separating and then growing into a new individual, which is characteristic of fragmentation in asexual reproduction.

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 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.

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 are not functional, and the protist moves passively via …

Answer 9

Given that the protist has long lash-like appendages, we can expect the following kind of locomotion:

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

The long lash-like appendages are likely flagella, which typically propel protists through a whip-like, back-and-forth motion.