Dilution is necessary during pure culture preparation to reduce the bacterial load and allow readable colonies to grow.
Dilution of bacteria culture is carried out in comparison to McCfarlan standard so as to have a decent number of bacteria that will not be too numerous or too little to observe the growth of distinct colonies during culture preparation.
Without dilution, colonies may form but may be too numerous to count. Too much dilution may also lead to no growth in the culture plates.
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An estuary is _______.
For environmental science plz helpp
Answer:
A
Explanation:
Answer:
a partially enclosed coastal body of water (usually at the mouth of a river) where fresh water from the river and salt water from the sea mix.
Explanation:
what is the main function of the cell wall in a plant cell
Answer: provides tensile strength and protection against mechanical and osmotic stress
Explanation:
ready-to-eat tcs food must be date marked if it will be stored for longer than:
Given what we know, we can confirm that ready-to-eat TCS food must be date marked if it will be stored for longer than 24 hours.
What is TCS food?TCS food refers to food that must be stored in temperature-controlled environments to ensure safety.These foods, if not stored properly and at the correct temperatures can cause sickness to the consumers.Why does it need to be date-marked?The reason the foods need to be date-marked is to relay information to the potential consumer as to by when the food should be consumed. This is done to ensure that if stored correctly, the food does not have time to spoil and cause health risks for consumers.Therefore, we can confirm that ready-to-eat TCS food must be date marked if it will be stored for longer than 24 hours in order to protect the health of the consumers.
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how the CO₂ in the atmosphere is changed as a result of the wildfires?
Answer:
Forests capture carbon from the atmosphere in the trees and soils. ... When forests burn, vast amounts of the stored carbon is emitted.
Hope that helped. x
what type of plate boundary interactions take place when the tonic plates slide past each other
convergent boundaries
divergent boundary
subduction boundaries
transform boundaries
WILL GIVE BRAINLIEST IF CORRECT PLEASE I NEED HELP!
Answer:
CBADE
Explanation:
The fault has an intrusion (D), and the oldest layers are on the bottom.
Can somebody help please due today
Answer:
Fossil record, history of life as documented by fossils, the remains or imprints of organisms from earlier geological periods preserved in sedimentary rock. Their ages can be established by comparing the fossils in each layer.
Answer:
Explanation:
Fossil record, history of life as documented by fossils, the remains or imprints of organisms from earlier geological periods preserved in sedimentary rock. Their ages can be established by comparing the fossils in each layer.
Credits to the person under me i just need points
(pretty sure its correct tho)
when taking a blood pressure reading which reading indicates the greatest force on the walls of the artery?
Answer: Systolic blood pressure
Explanation:
haemoglobin is presented in........................... cells
Why is it that nitrogen is often a limiting plant nutrient, despite the fact that the atmosphere is 80% nitrogen gas (N2)
Nitrogen is a limiting plant nutrient because the bulk of the available nitrogen in the atmosphere is not usable by plants.
Plants are not able to make use of the nitrogen in the atmosphere directly. Atmospheric nitrogen needs to be converted into usable forms before it can be accessed by plants.
The conversion of atmospheric nitrogen to usable form by plants is known as nitrogen fixation and this is achievable by the activities of certain bacteria.
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What are Chromatids in biology
Answer:
A chromatid is one of two identical halves of a replicated chromosome. During cell division, the chromosomes first replicate so that each daughter cell receives a complete set of chromosomes.
Explanation:
Using the explicit formula, calculate how far the students will be swimming on week 10 using Ernest's schedule.
Ernest would be swimming at 3.25 units on week 10
The explicit formula is given as:
[tex]a_n = a_1 + (n - 1) \times d[/tex]
Also, we have the following parameters
[tex]a_1 =1.0[/tex] -- the initial distance
[tex]d =0.25[/tex] --- the difference between concurrent distances
In week 10, the value of n is 10.
Next, substitute 10 for n in the explicit formula [tex]a_n = a_1 + (n - 1) \times d[/tex]
So, we have:
[tex]a_{10} = 1.0 + (10 - 1) \times 0.25[/tex]
Subtract 1 from 10
[tex]a_{10} = 1.0 + 9 \times 0.25[/tex]
Multiply 9 by 0.25
[tex]a_{10} = 1.0 + 2.25[/tex]
Add 1.0 and 2.25
[tex]a_{10} = 3.25[/tex]
Hence, Ernest would be swimming at 3.25 units on week 10
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glycogen synthase is an enzyme important for making glycogen. in response to glucagon, glycogen synthase is
On average, men have a basal metabolic rate (BMR) of 1.0 kilocalorie per kilogram per hour. Lawrence weighs 198 pounds. Calculate how much energy Lawrence expends for basal metabolism per day.
The energy Lawrence expends for basal metabolism per day is 2,160 kilocalories per day.
Basal metabolic rate is defined as the amount of energy that is used when an individual is at rest.
This energy is used for life sustaining functions such as:
breathing,circulation,nutrient processing andcell production.To calculate the Basal Metabolic Rate for Mr Lawrence,
Lawrence weight = 198 pounds
60
(convert pounds to kilogramme)
1 pound = 0.453592kg
198 pounds = x
xkg = 0.453592 × 198
= 89.8 kg
But BMR for average men = 1 kilocalorie per kilogram per hour.
That is, 1 kilocalories = 1 kg per hour
x kilocalories = 89.8 per day
Therefore for a day = 89.8 × 24 ( 24 hours = 1 day)
= 2155.469184
approximately. = 2,160kilocalories per day
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escribe ONE way that the use of rodenticides affects the kit fox population AND explain how the size of the kit fox population is affected.
One way that the use of rodenticides affects the kit fox population will be a
reduction in the population.
Foxes are secondary or tertiary consumers which feeds on smaller animals
such as rodents in the ecosystem. The use of rodenticides will kill and
reduce the number of rodents available for food.
The reduction in the rodents means lesser source of food for the foxes and a
decrease in the population. The size of the kit fox population is affected
because a larger size being more affected than the ones with a smaller
size/population.
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Please help, i'm failing biology and REALLY need honest answers.
( DNA unit test, unit 6 lesson 13. CONNEXUS )
How are new viruses made?(1 point)
A. asexual reproduction
B. sexual reproduction
C. viral DNA or RNA copied by viral cells
D. viral DNA or RNA copied by a host cell
Answer: i’m pretty sure it’s C
Explanation:
A. Modified TRUE or FALSE: Write TRUE if the statement is correct. Otherwise, change the underlined word/phrase to correct the statement.
Answer:
both are true
true
true.......
Can someone explain to me what flowering time is?? And how to control flowering time???
Answer:
Flowering time refers to the amount of time the plants will spend in the flowering stage. It begins when you switch your lights to a 12/12 schedule and ends when the buds are ready to harvest. ... In this case, the actual flowering time (as understood by most breeders) would be 2-3 weeks longer. so the flowers will spend time in differents parts of different stages
A dramatic change in the life cycle of plants is the transition to flowering, which is triggered by both environmental signals, as temperature and photoperiod, and endogenous stimuli. so it would just 2 be to watch over there environment and what u are doing 2 them
Explanation:
Answer:
Flowering time is the amount of time that a plant will stay in it's flowering stage. the flowering time of its life will reach 12 hours or less of light per day.
It's controlled by environmental conditions and development regulations, such as temperature, photoperiod and endogenous stimuli
hope this help's and have a good day :)
explain the correlation between solar radiation and kelp biomass.
Given what we know, we can confirm that although sunlight is beneficial to plant growth, intense solar radiation has been proven to be detrimental to the survival of kelp, thus reducing its biomass.
How does solar radiation affect kelp?Solar radiation is not harmful in very low amounts.
However, when exposed at long intervals or high intensity, it has been shown to cause tissue damage.
This tissue damage will inhibit the kelp's ability to undergo photosynthesis.
This means it will not be able to grow, and its biomass will be reduced.
Therefore, given the effect of solar radiation in damaging the kelp's ability to photosynthesize and thus reducing its growth, we can confirm that intense or prolonged exposure to solar radiation reduces kelp biomass.
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Prokaryotes and Eukaryotes share which
of the following structures?
DNA, cytoplasm, ribosomes, cell membrane
DNA, cytoplasm, ribosomes, mitochondria
nucleus, cytoplasm, ribosomes, mitochondria
Answer:
Dna,cytoplasm,ribosomes,cell membrane
Explanation:
Spindle fibers begin to form.
Answer: Yes that is true but you gave basically NO information at all.
Explanation:
Answer:
yes that that that that Tish that that
why is sunlight important for life on earth
Answer:
drives weather, ocean currents, seasons, and climate
Explanation:
The sun has extremely important influences on our planet: It drives weather, ocean currents, seasons, and climate, and makes plant life possible through photosynthesis. Without the sun's heat and light, life on Earth would not exist.
help me please help
Answer:
1) Predation
2) Competition
3) Symbiosis
Explanation:
Answer:
1. Predation
2. Competition
3. Symbiosis
Explanation:
Which definition best explains the term gene expression?
Answer:
Answer:
Gene expression is the process by which the information encoded in a gene is used to direct the assembly of a protein molecule. ... Each group of three bases (codon) corresponds to one of 20 different amino acids used to build the protein.
OR
Gene expression is. the activation of a gene leading to the transcription, translation and synthesis of a specific protein.
if you visit the beach on a hot summer day you will probably feel a Sea Breeze coming off the water onto the land. Which of the following causes this sea breeze?
A. The water is warmer than the land during the day.
B. Hurricanes that form in the oceans blow air into the shore.
C. During the day,solar radiation warms the land faster than the water.
D. Earth is tilted toward the Sun, causing air to move inland from the water
If I am correct, the answer is supposed to be C due to on hotter portions of the day, land warms much faster than the water. This causes cooler air to rise from the oceans and the wind currents then push the air towards the land.
HELP ME ASAP
A stray dog is brought into Destiny's clinic. The poor thing is eaten up with fleas, and she can see that it has terrible sores on its stomach. After giving the dog topical medication to kill the fleas, she also prescribes antibiotics to kill the bacteria in the sores. Which sentence BEST explains how these bacteriI were able to infect the poor dog?
A. The bacteria were epiparasites that were living inside the fleas and then transferred to the dog when the fleas bit him.
B. The bacteria were left behind when the fleas hatched from their eggs and embedded into the dog's skin.
C. The fleas' bites caused itching, leading the dog to scratch the skin and break the surface, providing a home for bacteria.
D. The antibiotics are being given to kill the bacteria, which is the larval stage of the fleas.
What safety precautions must I take in a minerals investigation?
Mercury is found in a food chain. Which organism would have the highest concentration?
a
A. Bacteria
O B. Shrimp
O C. Algae
O D. Shark
what is supplemental health insurance for elders called?
Answer: Medigap
Explanation:
The network of connective tissue fibers which pass through the tissues of the body and allow for the efficient movement of immune system cells is the
Answer:
reticuloendothelial system
Explanation:
The reticuloendothelial system (RES) is a heterogeneous population of phagocytic cells in systemically fixed tissues that play an important role in the clearance of particles and soluble substances in the circulation and tissues, and forms part of the immune system.