1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alenkasestr [34]
3 years ago
12

How does the temperature of water change if you heat it after it has

Biology
2 answers:
lyudmila [28]3 years ago
4 0

It does not change

(APEX)

Levart [38]3 years ago
3 0

Answer:

it remains constant once it reaches its boiling point.

You might be interested in
Can someone plssss helppppp ​
likoan [24]

Answer:I'm almost sure it's b or d hope this helped

Explanation:

4 0
2 years ago
What is a density-independent factor in controlling a population?
elena55 [62]
Diseases are the most deadly compared to water supply, tornados, and access to food. And more and more people are dying from diseases as the world gets worse .
Plz mark brainliest
4 0
3 years ago
Name three cell appendages
mel-nik [20]
The answer is a slim layer, Flagella, and a Fimbriae

Hope this helps!!
5 0
3 years ago
Cells that are larger and more complex than prokaryotes are _ cells
leonid [27]

Eukaryotes  are more complex cells, they are found in multi cellular organisms and contain organelles Prokaryotes are unicellular organisms which can also be called protista they only contain cytoplasm, ribosomes and free floating dn a

4 0
3 years ago
Biochemical and differential tests can be incorporated into growth media or performed on isolated colonies after they have been
Cloud [144]
<h2>Differential test</h2>

Explanation:

A differential test helps to distinguish that which species lack or have the particular biochemical process,the three differential test media are:

1) Blood agar: Blood Agar is an enriched medium which is used to culture those bacteria or microbes that do not grow easily

  • It is also required to detect and differentiate haemolytic bacteria, especially Streptococcus species
  • It is also a differential media in allowing the detection of hemolysis (destroying the RBC) by cytolytic toxins secreted by some bacteria, such as certain strains of Bacillus, Streptococcus, Enterococcus and Staphylococcus

2) Eosin methylene blue agar (EMB): It is a selective and differential medium used to isolate fecal coliforms

  • Eosin methylene blue are pH indicator dyes which combine to form a dark purple precipitate at low pH; they also serve to inhibit the growth of most Gram positive organisms
  • Sucrose and lactose serve as fermentable carbohydrate sources which encourage the growth of fecal coliforms and provide a means of differentiating them

3) Mannitol Salt Agar (MSA): It is a selective and differential medium

  • The high concentration of salt (7.5%) selects for members of the genus Staphylococcus, since they can tolerate high saline levels
  • Organisms from other genera may grow, but they typically grow very weakly

Three examples of tests which are done on colonies are:

1) Catalase test: Catalase is an enzyme that breaks hydrogen peroxide (H2O2) into H2O and O2

  • Hydrogen  peroxide is often used as a topical disinfectant in wounds, and the bubbling that is seen is due to  the evolution of O2 gas
  • A small amount of growth from the culture is placed onto a clean microscope slide
  • Few drops of H2O2 onto the smear is added
  • A positive result is the rapid evolution of O2 as evidenced by bubbling
  • A negative result is no bubbles or only a few scattered bubbles

2) Indole test: The main requirement for a suitable indole test medium is that it contain

s a sufficient amount of tryptophan

  • Tryptone broth is commonly used
  • The tube of tryptone broth with a small amount of a pure  culture is inoculated
  • Incubation is done at 35°C (+/- 2°C) for 24 to 48 hours
  • To test for indole production, 5 drops of Kovács reagent is directly added to  the tube
  • A positive indole test is indicated by the formation of a pink to red color  in the reagent layer on top of the medium within  seconds of adding the reagent
  • If a culture is indole negative, the reagent layer will remain yellow or be  slightly cloudy

3) Urease test: Urease is a constitutively expressed enzyme that hydrolyzes urea to carbon dioxide and ammonia

  • The urease test identifies those organisms that are capable of hydrolyzing urea to produce ammonia and carbon dioxide
  • Urease test media contain 2% urea and phenol red as a pH indicator
  • An increase in pH due to the production of ammonia results in a color change from yellow (pH 6.8) to bright pink (pH 8.2)
  • Urea broth is a highly buffered medium requiring large quantities of ammonia to raise the pH above 8.0 resulting in a color change
4 0
3 years ago
Other questions:
  • Suggest why it is a vital function of pedicellariae to clean the surface of a starfish.
    5·1 answer
  • One of the following is NON-polar molecule
    10·1 answer
  • A large plant population may impose selective pressure on a smaller, isolated group of plants, resulting in a change in allele d
    6·1 answer
  • Which term is used to describe a fact that has always been observed true but could at some future time not be observed as true.A
    10·1 answer
  • What is product of meiosis 1
    13·2 answers
  • Describe 2 adaptations that allow humans to be bipedal
    15·1 answer
  • What is the most important function of sweating
    8·2 answers
  • All rocks on Earth are eventually recycled into another type. In between the rock, types are different forms of materials, such
    11·1 answer
  • What of the following correctly identifies some of the molecules produced from the glucose synthesised by photosynthesis?
    12·1 answer
  • What does the author predict about the future of the Earth's mantle? Do you support his educated guess? Use complete sentences t
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!