Why were most test tubes incubated at 37 ⁰C?

Answers

Answer 1

Answer:

Optimal Growth Conditions

Explanation:

Different bacteria like to grow at different temperatures.  By changing the temperature. Organisms that grow best at human body temperature, which is approximately 37 degrees Celsius (98.6 degrees Fahrenheit), are called mesophiles.

Hope this helps.


Related Questions

I NEED SOMEONES HELP ON THIS QUESTION THE PICTURE IS ABOVE

Answers

Answer:

chemical that's the answer!

Answer:

c) Chemical

Explanation:

The poison dart frog triggers the production of a chemically dangerous alkaline Batrachotoxin, when it feels a threat to itself or its habitat.

The skunk similarly sprays chemical containing aerosols, that have an offensive odour to defend itself.

If a man is color blind (an X-linked trait), how did he get this condition?
He got it from either his mom or his dad.
He got it from both his mom and his dad.
He got it from his dad.
He got it from his mom.

Answers

Answer:

He got it from his mom.

Explanation:

An X-linked trait means it is transmitted on the X chromosome.

Females have two X chromosomes (XX), and males have one X and one Y chromosome (XY).

Males get their Y chromosome from their dad, and X chromosome from their mom.

Therefore, the man inherited the colorblindness trait (X chromosome) from his mom


With parallel flow, diffusion of urea happened at regions I and II but not at regions III, IV, or V because...
A
Urea was too big to fit through the pores in regions III, IV, or V.
B
There was no concentration gradient for urea in regions III, IV, or V.
С
There was no urea in the blood in regions III, IV, and V.
D
The pore size was too small in regions III, IV, and V.

Answers

Answer:B

Explanation:bc all of the other ones was equal together and the concentration gradient could not spread them

Answer:

The correct answer is

b

Explanation:

First we can elimenate A and D because the pore size is the same.

C is wrong, there is still some urea in the blood, however is less

We are left with B which is the correct answer, i did the gizmo

Please leave a thanks and rate this answer 5 stars, you don't need an acount to do this.

The swallowing phase where the velopharynx closes forcefully and larynx completely closes at 3 levels is the...
a. Tongue preparatory phase
b. Pharyngeal transport phase
c. Oral transport phase
d. Laryngeal transport phase

Answers

Answer:

b. Pharyngeal transport phase

Explanation:

During the pharyngeal phase, the vocal folds close to keep food and liquids from entering the airway.

Swallowing the velopharynx closes forcefully and the larynx completely close at the level of the pharyngeal transport phase this action seal the airway passage, hence option b is correct.

What is swallowing ?

According to where the bolus is located, the swallowing process is often split into oral, pharyngeal, and esophageal phases. When consuming solid food vs drinking liquid, the food moves differently through the oral cavity and into the oropharynx.

The tongue closes the oropharynx while it is in the pharyngeal phase. The proximal pharyngeal wall and soft palate serve as a barrier to the nasopharynx.

The laryngeal entrance is sealed off by the vocal cords and arytenoids, and the epiglottis swings down to cover the laryngeal vestibule. These acts close up the pharyngeal cavity's airway.

Therefore at 3 levels, the velopharynx closes forcefully and the larynx completely closes in the pharyngeal transport phase action to seal the airway passage, hence option b is correct.

Learn more about swallowing, here:

https://brainly.com/question/9374866

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What similarities and differences do DNA and RNA share in terms of function and structure? Explain!

Answers

Answer: Both DNA and RNA have four nitrogenous bases each—three of which they share (Cytosine, Adenine, and Guanine) and one that differs between the two (RNA has Uracil while DNA has Thymine).

Explanation:

The passive movement of particles from a region of higher concentration to a
region of lower concentration is known as...
A. Diffusion
B. Active Transport
C. Osmosis
D. Selective Permeability

Answers

Answer:

Answer is A. Diffusion

Explanation:

Because diffusion is a passive process in which a substance moves from a higher concentration to a lower concentration until the concentration becomes equal

The passive movement of particles from a region of higher concentration to a region of lower concentration is known as diffusion. Thus, the correct option is A.

What is Diffusion?

Diffusion may be defined as the passive movement of particles from a region of higher concentration to a region of lower concentration.

Active transport requires energy for the movement of particles. Selective permeability may be defined as the ability to differentiate the movements of different types of particles in and out of the membrane.

Therefore, the correct option for this question is A.

To learn more about Diffusion, refer to the link:

https://brainly.com/question/24847461

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Which is not a unique property of water

Answers

Answer:

A

Explanation:

All of the other options are specific to water, but quite a few liquids cool off a lot faster than water.

water cools very rapidly is not a unique property of water. Thus option A is correct.

what are the properties of water molecule ?

It has no taste, odor, or transparency, where the nucleus of the oxygen atom  attracts electrons strongly than the nuclei of the hydrogen atoms.

In water molecule oxygen is more electro negative and electron-greedy than hydrogen, results in the development of  a partial negative charge on the oxygen of the water and a partial positive charge on the hydrogen end.

Water shows strong cohesive property where the attraction of molecules for other molecules of the same kind is referred to as cohesion.

Surface tension is defined as  the tendency of  the surface to resist rupture when they are subjected to stress due to cohesive forces.

For more details regarding water, visit:

brainly.com/question/2602094

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Your question was incomplete, so the complete question is

Which is not a unique property of water

A) water cools very rapidly

B) frozen water floats on liquid water

C) water molecules stick to each other through hydrogen bonds

D) water covered most of the earths surface and retains a large amount of heat

2
If an organism has 15 chromosomes in a single sperm cell, how many
chromosomes would reside in its somatic cells?
O 15
O 30
0 7.5
45

Answers

Answer:

i just think but not sure

the answer is 30.....

I think but not sure

clarify and tell whether I am correct or not

Laws have been enacted to regulate cigarette labeling and advertising. What is this an example of?
an impact of changing scientific knowledge on society
the interrelationship of science and technology
an influence of society on scientific progress
the changing nature of scientific knowledge

Answers

Answer: B

Explanation: Society is basically a community of people and the way they live.  The study on smoking is definitely science.  So it would be b.

Answer:

A

Explanation:

I'm pretty sure it's A :)

Plz help me with this question!!!!!!

Answers

ANSWER:_____________________________________

Solution : It is a mixture of solvent (Major component mostly liquid) and solute (Minor component).

It is asking from a solution where water and solute are moving whether outise or inside.

_____________________________________As Per Hint Given:

Solute ; Moves from higher concentration to the lower concentration by the process of diffusion.Solvent(Water) ; Moves from low solute area to the high solute area by the process of osmosis._____________________________________ROW 1 :

26: Inside the cell (because inside the cell there is 5% solute(salt) whereas outside the cell it is 10%)

27: Outside the cell (outside the cell there is more concentration of salt so water moves out)

ROW 2:

In Row 2 there is equal amount of salt outside and inside the cell so Solute and Solvent do not move because the solution is ISOTONIC

28: NO MOVEMENT

29: NO MOVEMENT

ROW 3:  

30: Glucose moves outside the cell

31: Water moves inside the cell (because glucose is more inside the cell)

ROW 4

32: Outside the cell (same reasons as above)

33: Inside the cell

ROW 5

34: NO MOVEMENT

35: NO MOVEMENT

ROW 6

36: Outside the cell

37: Inside the cell

ROW 7

38: Inside the cell

39: Outside the cell

ROW 8

40: Outside the cell

41: Inside the cell

ROW 9

42: Inside the cell

43: Outside the cell

_____________________________________

What type of hormone is testosterone?
a steroid hormone
a protein hormone
a neurotransmitter​

Answers

Testosterone is a
a) a steroid hormone

Please help. This is due today :(

Label the following.. Word bank is below

Answers

label what..? where’s the word bank

A diagram that is used to show the loss of energy as you go forward in a food chai
a.) food web
b.) energy pyramid
c.) concept map
d.) trophic levels

Answers

Answer:

tropical levels ........

What is the alien invasion in the Florida Everglades?​

Answers

The foreign Burmese Python has disrupted the entire animal population in the Everglades. These invaders from Asia have proved to be extremely detrimental to Florida’s ecological systems, based on factors including their size, rapid reproduction, predatory diets, and Florida’s weather and climate conditions. Due to these multiple elements, Burmese Pythons have taken over the Everglades and have shown no signs of stopping. The problem becomes even more difficult to handle when the environmental controls taken to remove these pythons fail to counter the increasing python population in the Everglades. In other words, because of the biology of these snakes, the problems they bring to the South Florida food chain and the lack of removal of the invasive predators, Burmese Pythons create major issues for the ecosystem and are likely to spread if not controlled quickly. Hope that is enough! :)
Burmese Python Invasion of Everglades National Park, Florida
Over the past two decades, an alien predator has invaded Florida's Everglades National Park, causing damage to the entire South Florida ecosystem. The foreign Burmese Python has disrupted the entire animal population in the Everglades.

How is chromatin structurally different from chromosomes?

Answers

Answer:

The main difference between chromatin and chromosome is that chromatin consists of the unravelled condensed structure of DNA for the purpose of packaging into the nucleus whereas chromosome consists of the highest condensed structure of the DNA doublehelix

Which of the following does NOT affect the climate?


greenhouse effect


solar radiation


war

Answers

Answer

the answer is war

Explanation:

Answer:

the one that does not affect the climate is the greenhouse effect

Explanation:

Methamphetamine increases the brain's levels of dopamine, __________ and __________.

a) norepinephrine, serotonin

b) GABA, epinephrine

c) acetylcholine, enkephalins

d) glutamate, serotonin

Answers

Answer:

a) norepinephrine, serotonin

Explanation:

Neurotransmitters are special lipid-based molecules used in chemical signal transduction in the nervous system. They have receptor-specific roles in activating different regions of the central nervous system (CNS) and physiological responses. These include: dopamine, norepinephrine, and serotonin .

The CNS, which includes the brain and spinal cord, can be affected by certain drugs like methamphetamine. This drug is a stimulant that acts on brain regions such as:

prefrontal cortex the striatumthe nucleus accumbens

It causes the release of neurotransmitters while blocking their reuptake at synapses; meth is metabolized very slowly over time (12 hours). The buildup of dopamine, for instance, leads to altered moods, feelings of pleasure and euphoria.

Thus, this change or "high" leads to dependency by users for its mood-altering effect; however, less dopamine is released, and the pleasurable effects, become less potent.  Studies show neurological damage with prolonged use, and habit formation and over time, addiction.

1. Where in the paramecium might you find proteins? Explain why?

Answers

Ribosomes because that’s where proteins are made and packaged

define the following term ​

Answers

Answer:

What is the following term?

Explanation:

What you are asking is vague, you should add a term to define.

I have a question regarding construction building code ? can you help? ​

Answers

depending on the question you should probably be able to look it up and find it in a handbook construction code for your city

Which of the following choices is NOT an essential nutrient?
A
amino acids
B
nucleic acids
с C
fatty acids
D
vitamins

Answers

Answer:

the answer is B. nucleic acids

Planet X is a terrestrial planet in our solar system. It has 21% oxygen in its atmosphere. Humans can walk on this planet without the aid of a space suit. Based on the description, planet X is____ .
a.Earth
b.Mars.
c.Mercury
d.Venus

Answers

Answer: the answer is actually earth

Explanation: A

If the heart rate drops and the stroke volume increases, cardiac output will always show a
decrease.
O True
False

Answers

Answer:

False

Explanation:

hope this helped! :)

What will happen following contraction of the diaphragm

Answers

Answer:

Can you provide more details please?

Explanation:

Which primate group is classified as hominins

Answers

the group consists of modern humans, extinct human species, and all our immediate ancestors.

Why do planets close to the sun have thin atmospheres and the planets far away from the sun have thick atmospheres. Use what you know about the nebular theory.

Answers

Answer:

There are two primary factors: size and distance from the Sun. Gravity helps planets and moons to hold on to their atmospheres, so small planets/moons such as Mars and the Moon have thin atmospheres. The reason why the outer planets are larger is probably down to two major factors. The first is simply the amount of material available which may be accreted to a planet. Clearly, the further away from the Sun, the longer the orbit (twice as far means an orbit twice the physical length).

Explanation:

DNA TO PROTEIN

How is DNA used to “make” Proteins?

OCA2 Gene:

ATA CTC TAC CTT GAG CCG

Answers

Answer:

The recombinant vesiculoviruses can also be inactivated for use as killed vaccines. ... 102000004163 DNA-directed RNA polymerases Human genes 0.000 claims ... Proteins 0.000 claims description 54; 101710002679 OCA2 Proteins 0.000 ... CCA TTC AAT ATA GGT CTT TAC AAG GGA ACG ATT GAG CTC ACA ATG ...

Explanation:

The virus thus constructed can be used as an immunization vaccine against measles ... 108090000626 DNA-directed RNA polymerases Proteins 0.000 claims ... Proteins 0.000 claims description 37; 102100016028 P protein Human genes ... Trp Trp 480 485 490 gct gag caa gat tct ccg ttc tgc ttc ctt gcg ttc tgc ttt gag tac 1539 ...

4. Earth's lower mantle lies belor what​

Answers

Answer:

crust

Explanation:

Answer:

the crust

Explanation:

Earth's lower mantle lies just below the crust. In geology, a crust is the outermost layer of a planet. The crust of the Earth is composed of a great variety of igneous, metamorphic, and sedimentary rocks

if tanA= x/y find the value of xsinA+ycisB ​

Answers

Answer:

If tan A = 3 / 5, then sin A = 3√34 / 34 and cos A = 5√34 / 34  .

Assuming x = 5 and y = 3 (The problem is deficient in this regard)

5(3√34 / 34) + 3(5√34 / 34)

30√34 / 34

15√34 / 17

Explanation:

I hope this helps!

HELP HELP HELP ASAP ILL GIVE 100 points

Answers

Answer:

What's the question you need help with?? I will try my best to help. I'm not taking free points btw. I'm just wondering on what your question is

release,connect and contract
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