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
JulsSmile [24]
3 years ago
9

The best method to isolate single colonies is the ___________ plate, and the best method to count colonies is the ___________ pl

ate
a. streak, pour
b. defined, complex
c. complex, defined
d. spread, streak
e. pour, streak
Biology
1 answer:
OverLord2011 [107]3 years ago
8 0

Answer:

option a. streak, pour

Explanation:

The best method to isolate single bacterial colonies is the "streak-plating" method.

The "streak-plate" procedure is used to isolate pure cultures of bacteria or also colonies, from mixed populations by mechanical separation. Millions of cells form a colony, they grow in a cluster on an agar plate. With this method, a mixture of cells is spread over the surface of a agar-based nutrient in a petri dish, that makes that less bacterial cells are deposited at widely separated point on the surface and, after incubation, they develop into colonies.

On the other hand, the best method to count colonies is the pour plate method. It helps to enumerate bacterial cells in a mixed sample, often used to count the number of microorganisms in those samples, which are added to a molten agar medium before its solidification occur. The result is colonies uniformly distributed throughout the solid medium when the appropriate sample dilution is plated.

You might be interested in
Normally, activity of the hypothalamic-pituitary-adrenal axis is regulated by a feedback loop that reduces the release of cortis
Sergeu [11.5K]
<span>The correct answer is c. ​hypothalamus to pituitary gland to adrenal glands.
</span>
When it comes to stress, hypothalamus-pituitary-adrenal axis (HPA) is responsible for stress response. Hypothalamus releases corticotropin-releasing hormone (CRH) which binds to its receptors on the anterior pituitary gland. As a result, adrenocorticotropic hormone (ACTH) is released and it stimulates the release of cortisol from the adrenal gland. At a certain levels of cortisol, this steroid hormone exerts negative feedback to the hypothalamic release of CRH.
4 0
3 years ago
As the hypothesis of sea-floor spreading predicts, the age of the ocean floor differs with location. What pattern does the ocean
zaharov [31]
Yes the hypothesis of the sea-floor spreads through the ocean ageing
7 0
3 years ago
The function of tRNA is to
a_sh-v [17]
The function of tRNA is to read the messages of the nucleic acids, and then translate it into amino acids.
8 0
3 years ago
The characteristic that results from a monohybrid cross is the _____ trait.
Gala2k [10]
The answer is dominant.

A monohybrid cross involves organisms that are heterozygous for only one character. In autosomal dominant traits, the phenotype is present if both copies of the dominant allele (A) are present (homozygous individuals AA) or only one copy of the dominant allele is present (heterozygous individuals Aa). <u>Thus, t</u><span><u>he characteristic that results from a monohybrid cross is the dominant trait.</u></span>
4 0
3 years ago
PLZZZZZ HURRY!!!!!Scientists estimate that the Earth formed some 4.6 billion years ago with the first forms of life appearing ar
FinnZ [79.3K]
I have no idea, i speak english how about u

3 0
3 years ago
Other questions:
  • Why do microbiologists need to isolate bacterial colonies from a specimen? quzilet?
    15·2 answers
  • Which statement represents the definition of a reversion (reverse mutation)?
    9·2 answers
  • Approximately how many miles is 1 kilometer equal to? On a scale (1:24 000
    7·1 answer
  • Which of the following tissues, cells, or structures in flowering plants is a part of the sporophyte generation and therefore di
    10·1 answer
  • Which of the following is NOT TRUE about amino acids?
    13·1 answer
  • The process of the formation of ATP is known as ______.
    15·2 answers
  • 5
    11·1 answer
  • Why environmental health is a community issue​
    6·1 answer
  • (EASY BRAINLIEST) I am Making a study guide about Plants in the plains and will give thanks and brainliest to the best study gui
    6·2 answers
  • Function of throxine and insulin​
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!