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Ilia_Sergeevich [38]
3 years ago
12

"Consider a gram-negative pathogen isolated from marine mammals. This pathogen is subjected to a series of tests and found to ha

ve the following characteristics:_______________
a) oxidase-positive,
b) does not hydrolyze urea,
c) produces indole,
d) does not produce acetoin.
Biology
1 answer:
Effectus [21]3 years ago
7 0

Answer:

The pathogen is Pasteurella multicida.

Explanation:

Pastuerella multicida is a gram negative, non motile bacteria that is penicillin sensitive and belongs to the family pasteurellaceae. It is a common cause infection from dogs and cats bites.

Gram staining is a method use to distinguish and classify bacterial species into large groups which are either gram positive or gram negative.

Gram negative bacteria are bacteria that do not retain the crystal violet stain used in their gram staining while

Gram positive bacteria are bacteria that retain the crystal violet stain by their thick peptidoglycan cell wall found in them.

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Gold has a specific heat of 0.129 J/(g×°C). How many joules of heat energy are required to raise the temperature of 15 grams of
Elodia [21]

Answer:

\boxed {\boxed {\sf 121.905 \ J  }}

Explanation:

We are asked to find the energy given mass, specific heat, and change in temperature. Therefore, we must use this formula;

q= mc \Delta T

The mass is 15 grams and the specific heat is 0.129 J/(g×°C). Let's calculate the change in temperature.

  • ΔT= final temperature - initial temperature
  • ΔT= 85 °C- 22°C = 63°C

Now we know all the values:

m= 15 \ g \ \\c= 0.129 \ J / (g* \textdegree C) \\\Delta T= 63 \ \textdegree C

Substitue the values into the formula.

q= (15 \ g)( 0.129 \ J / (g* \textdegree C)) ( 63 \ \textdegree C)

Multiply the first numbers together. The grams will cancel.

q= (1.935 \ J/ \textdegree C) ( 63 \ \textdegree C)

Multiply again, this time the degrees Celsius cancels.

q= 121.905 \ J

<u>121.905 Joules</u> are required.

5 0
2 years ago
Read 2 more answers
Northern flickers are woodpeckers of the eastern United States. Males, but not females, have black feathers that resemble a mous
jek_recluse [69]

Answer:

This suggests that the moustache is a releaser for aggression.

Explanation:

<em>Fixed action patterns</em> are instinctive programmed responses in different species that are triggered by a specific external sensory stimulus. These stimuli are called sign stimuli or releaser. When the sign occurs, the animal starts a sequence of acts in response to the stimulus and continuous until the series of actions is completed.

The black feathers resembling a mustache in a <em>Northern flickers</em> male are an external sensory stimulus. This trait that can provoke another male to respond aggressively, as a f<em>ixed action pattern</em>.  

This trait might be considered as an <em>unconditioned stimulus</em>, which <em>provokes an unlearned or reflex reaction</em>. These aggressive responses are triggered by reflex.

7 0
3 years ago
Researchers have been developing an artificial leaf, a device that mimics the actions of photosynthesis. The artificial leaf har
Vikentia [17]
The answer is C. The products contains high energy chem bonds
3 0
2 years ago
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How can it be possible that scientists do not currently have fossil evidence for every organism that once lived?
olya-2409 [2.1K]

Answer:

How can you know what happened millions of years ago if no one was there to see it? Evidence and observation are the building blocks of all scientific inquiry; ... of the fossil record, geological formations, and genetics attest to change having taken ... clues together into a cohesive explanation of the diversity of living things. Because of the specialized and rare conditions required for a biological structure to fossilize, many important species or groups may never leave fossils at all. Even if they do leave fossils, humans may never find them—for example, if they are buried under hundreds of feet of ice in Antarctica.

Explanation:

7 0
3 years ago
1. Why do organisms have to keep eating?
VLD [36.1K]

Answer:

D

Explanation:

This is because food is needed in the border in order to supply adequate food and oxygen to the growth cells to stimulate proper growth and development, to repair worn out tissues and cells and also to aid in some sort of cell division which leads to growth

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2 years ago
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