PLEASE HELP ME ASAP!
Methods for the Culturing
Answer:
There are several types of bacterial culture methods that are selected based on the agent being cultured and the downstream use.
• Broth cultures.
• Agar plates.
• Agar based dipsticks.
• Stab cultures.
• Culture collections.
•Solid plate culture of thermophilic microorganisms.
• Isolation of pure cultures.
If you had a gram of water and a gram of oxygen, which substance would you have more particles of? Why?
The substance that will have more particles is 1 g of oxygen.
Avogadro's hypothesis 1 mole of water = 6.02×10²³ particles 1 mole of oxygen = 6.02×10²³ particlesBut
1 mole of water = 18 g1 mole of oxygen = 16 gTherefore,
18 g of water = 6.02×10²³ particles 16 g of oxygen = 6.02×10²³ particlesHow to determine the particles in 1 g of water18 g of water = 6.02×10²³ particles
Therefore,
1 g of water = (1 × 6.02×10²³) / 18
1 g of water = 3.34×10²² particles
How to determine the particles in 1 g of oxygen
16 g of water = 6.02×10²³ particles
Therefore,
1 g of oxygen = (1 × 6.02×10²³) / 16
1 g of oxygen = 3.76×10²² particles
SUMMARY 1 g of water = 3.34×10²² particles 1 g of oxygen = 3.76×10²² particlesFrom the above, we can conclude that 1 g of oxygen contains more particles than 1 g of water
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2. Which of the following would best describe the role of enzymes in cells?
a. Controlling the rate of reactions
b. Storing the genetic code
c. Maintaining a constant body temperature
d. Breaking down large molecules into smaller molecules Justify your choice of answer:
Explanation:
The answer is; enzymes speed biochemical reactions by rearranging molecular structure to support the cell function. protein catalysts ..
the answer is D.
13. Which of the following is the most challenging issue facing genome
sequencing or organism modification?
a. availability and stability of DNA
b. ethics of using information from genomes at the individual level
c. inability to develop fast and accurate sequencing or modifying
techniques.
d. all of the above
_______14. What carries a gene from one organism into a bacterial cell?
a. a plasmid c. electrophoresis gel
b. a restriction enzyme d. polymerase chain reaction
_______15. When was the Polymerase Chain Reaction discovered?
a. 1963 c. 1983
b. 1973 d. 1993
Answer:
13) B) Ethics of using information from genomes at the individual level
14) A) a plasmid
15) C) 1983
~
Hope this helps!
Why does mature soil contain the why does mature contain most humus?
a. Has the least decomposed organic material from trees and vegetation
B The mature soil has the most soil horizons
C The mature soil has the biggest layer of bedrock
D. Has the most decomposed organic material from trees and vegetation
Answer:
D. Has the most decomposed organic material from trees and vegetation
Explanation:
Mature soil has the most decomposed organic material from trees and vegetation. Therefore, option D is correct.
What is matured soil?A soil that has completed all the developmental phases and becomes stable when the addition of organic material becomes equal to the withdrawal of soluble minerals by the plants.
They are formed from rocks through the process of weathering and erosion. These processes take place by the wind, water, living organisms, pressure, change in temperature, and chemical reactions. There are three layers present in the mature soil and that are topsoil, subsoil, and parent rock. These layers are known as horizon.
Thus, mature soil consists of the most decomposed material from trees and vegetation. Therefore, option D is correct.
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Please help me I need to pass the test so iva. Be able to play soccer
Earth and space
Answer:
d
Explanation:
. Define homeostasis and describe how this concept can be used to explain physiological control mechanisms
In this exercise we have to define what a homeostasis is and thus explain the physiological mechanisms for this concept, such as:
The homeostasis is understood as the tendency that a system has to act to maintain its own stability, even under adverse conditions and exposed to changes.
What is the definition of homeostasis?Currently, homeostasis, in general, is characterized as a condition of balance in the body's internal environment, regardless of changes in the external environment. This ensures, for example, the regulation of body temperature even in cold environments.
What are the main factors that regulate homeostasis?Temperature;Salinity;pH;Concentrations of nutrients such as glucose, gases such as oxygen and waste products such as carbon dioxide and urea.See more about homeostasis at brainly.com/question/9087319
If the pores in the dialysis tubing were too small to allow iodine potassium to pass through, would the liquid in the tubing turn black?
Yes or no?
Based on selective permeability, if the pores in the dialysis tubing were too small to allow iodine potassium to pass through, the liquid in the tubing would not turn black.
What is Selective permeabilitySelective permeability refers to the ability of a membrane to allow some molecules to pass through it but no others.
In the dialysis tubing, selective permeability is used to remove some substances but not others.
The selective permeability of the dialysis tubing depends on the pore size.
When a dialysis tubing containing starch solution was dipped into a beaker containing iodine, the solution in the tubing turned black due to the ability of iodine molecules to pass through the membrane.
However, if the pores in the dialysis tubing were too small to allow iodine potassium to pass through, the liquid in the tubing would not turn black.
Learn more about selective permeability at: selective permeability
You blink your eyes. Was work done??
Answer:
yes
Explanation:
Matter is what the entire
and
is made of
oh i didnt know that, cool
Why is biodiversity important in ecology?
Answer:
its the key indicator of the health of an ecosystem
describe where the single cell gets the information to ultimately produce an adult human
A plant has wrinkled seeds. In this species, round seeds are the dominant tralt over wrinkled seeds.
What can you say about this plant?
O If the phenotype Is RR, the genotype is wrinkled seeds
O Plants with RR and Rr genotypes will all have wrinkled seeds
O If the plant has wrinkled seeds, the genotype must be rr
If the plant has wrinkled seeds, It's genotype is Rr
NI
Answer:
the 3rd option rr
Explanation:
if the seeds show a recessive trait, then it can only be when all alleles are recessive (in this case its rr).
A missense mutation results in which of the following?
Answer:
A missense mutation is a mistake in the DNA which results in the wrong amino acid being incorporated into a protein because of change, that single DNA sequence change, results in a different amino acid codon which the ribosome recognizes. Changes in amino acid can be very important in the function of a protein.
uhmm can anyone help me with this pleaseeee quickly
Answer:
Not Italy, United States,
Probably C or D
Because offspring are more frequent In Africa due to poor quality of life.
substances that are at their simplest state are called _____?
A scientist wants to study the effect of vitamin C on colds. He gave 1000 mg of vitamin C per day to 100 people. What would be the best control?
A. Give the control group a pill similar to vitamin C but containing no vitamin C (a placebo)
B. Give the control group 2000 mg of vitamin C per day
C. Give the control group orange juice every day
OD. Give the control group nothing.
O E. Give the control group 1000 mg of another brand of vitamin C per daY
Answer:
D
Explanation:
Give the control group nothing. They are going to have to use their own blood system to fight the cold. The difference in results will be if Vit C produces better results than the nothing group.
can a woman lactate without being pregnant ?
Answer:
Hormones signal the mammary glands in your body to start producing milk to feed the baby. But it's also possible for women who have never been pregnant — and even men — to lactate
Explanation:
read the answer please
When do neap tides occur?
Explanation:
neap tides occured during the first and third quarter moon
Which physical characteristics do scientis use to classify organisms in domain eukaraya
What is the dominant generation in monocots?
The gametophyte is the dominant generation
The most common organisms with the normal flora of the mouth are various species of what?
Answer:Streptococcus, Granulicatella, Gemella, and Veillonella are amongst the predominant microorganisms of the oral cavity; however, the majority of bacteria are explicit to certain sites.
Explanation:
Which of following has the least ecological tolerance to climate change?
- Small island close to the mainland
- Small island far away from the mainland
- Large island close to the mainland
- Large island far away from the mainland
Given what we know, we can confirm that a small island far away from the mainland is the least tolerant to climate change.
Why is this the case?A small island far away from the mainland is less tolerant of climate change from an ecological viewpoint than the other options listed. This is the case because of the size and location of the lsland. A small faraway island does not have many options for the wildlife to migrate or adapt and is therefore more intensely affected by any changes in climate.
Therefore, we can confirm that a small island far away from the mainland is the least tolerant to climate change.
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Answer: Its B guys :)
Explanation: I got it right on the test!
It takes the Earth _______ to complete one revolution around the Sun.
Answer:
365 days
Explanation:
Earth to go around sun=365 days
Hope it helps.
What are marine algal blooms, red tides, and dead zones? How might biological magnification play be part in human illness?
Answer:
Cyanobacteria, a type of photosynthetic bacteria also known as blue-green algae, are often the cause of algal blooms in freshwater and occasionally in marine water. ... Cyanobacteria HABs produce multiple toxins, including liver, nerve, and skin toxins, which can affect human and animal health.
Many red tides produce toxic chemicals that can affect both marine organisms and humans. The Florida red tide organism, K. brevis, produces brevetoxins that can affect the central nervous system of fish and other vertebrates, causing these animals to die.
Explanation:
Name a supernova remnant that spins and emits radiation in
pulses?
Answer:
A pulsar is a supernova remnant
how did the ocean start to change the second atmosphere into the third atmosphere that we know today? (keep the answer short please)
What is the term used to describe a collection of axons in the brainstem?
Nucleus
Tract
Ganglion
Nerve
Help please, I will gibe brainly for the correct answer!
Chloe, age 5 is going to the store to buy her father a birthday present. She picks out a stuffed animal, a Barbie doll, and a whoopee cushion. Her choices are ___________ which is indicative of her being in the _________ stage.
conservation; preoperational
egocentric; preoperational
theory of mind; sensorimotor
When people use a biopsychosocial approach informed by a number of different psychological theories they are very likely to gain a…
high five
comprehensive understanding of a family's ethnic origin.
comprehensive understanding of an individual's development.
We can conclude that, Barbie's choices are egocentric which indicates her being in the preoperational stage of Piaget's theory of cognitive development.
People who use a biopsychosocial approach are most likely to gain a: comprehensive understanding of an individual's development.
What is the Preoperational Stage?
The preoperational stage is the second stage in Piaget's theory of cognitive development, which is characterized by:
EgocentrismSymbolic representationThe preoperational stage begins from 2 years of age up to 5 years of age. At this stage, children tend to use symbols to represent their own world.
According to Piaget, children tend to be egocentric during the preoperational stage, which explains why Chloe will get a gift like a Barbie doll for her dad. This shows Chloe, at this stage, cannot understand that her dad think in a different way she thinks.
Therefore, we can conclude that, Barbie's choices are egocentric which indicates her being in the preoperational stage of Piaget's theory of cognitive development.
What is the Biopsychosocial Approach?In psychology, the biopsychosocial approach is a wide approach that takes into consideration biological, social, and psychological factors, and how they interact to influence health care delivery, illness and health.
Therefore, people who use a biopsychosocial approach are most likely to gain a: comprehensive understanding of an individual's development.
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