A specific type of bacteria increases exponentially with a growth rate of r=0.4 per hour. Assume there are 16 bacteria present at t=0. When will the population reach 10000?
The population would reach 10000 at the time of 25,000 hours
Calculation of exponential growth rateThe exponential growth rate of the bacteria = 0.4 /hr
The number of bacteria at time 0 = 16 bacteria
The time for the bacteria population to reach 10000 = ?
But if , 1 hour = 0.4 bacteria
X hour = 10000
Make X the subject of formula;
X = 10000/0.4
X= 25,000 hours
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difference between homologous and analogous organs
Hi!Homologous structures share an identical embryonic origin; analogous organs have an identical function.
Answer:
Hope these two pics help, I actually don't know what that is, but I think I do now, I got this from the internet, hope this helps
2.Imagine that you are a nitrogen molecule. Write a story about the
journey you take as you travel through the nitrogen cycle. Include
the following in your story:
A description of your trip through the cycle including (1) where
you went, and (2) how you got there;
A description of why your journey will never end;
Include as many of the following terms in your story as well:
Atmosphere
Bacteria
"Fixing"
Nitrogen
Consumers
Producer
Decomposition
Fertilizer
Manure
Runoff
Answer:
Water moves from the ground or oceans into the atmosphere through a process called evaporation. It's a process that happens on a molecular level when the molecules of water are really energized and rise into the air. Now you've got water in the air and water on land. Organisms all over the Earth need water to survive.
Explanation:
please brainless
why do blue whales explode when they die
Answer:
Gas build up inside the body.
Explanation:
When a blue whale dies, the body starts decomposing, and the gases cannot escape, resulting into the explosion.
Answer:
A decomposing whale carcass generates gases which build up inside their stomach and large internal organs. This then causes them to expand, but whale skin and blubber are tough so the gases become trapped inside. Whales can apparently hold in gasses, or the “death burp,” for long periods after they die, sometimes resulting in massive and extremely messy explosions.
Explanation:
Summarize the protein synthesis pathway:
Answer:
Protein synthesis is the process in which cells make proteins. It occurs in two stages: transcription and translation.
Explanation:
Transcription is the transfer of genetic instructions in DNA to mRNA in the nucleus. It includes three steps: initiation, elongation, and termination.
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What resources do scientist use to predict when and where future natural hazards may occur?
Answer:
See below ~
Explanation:
Scientists map natural hazards caused by catastrophic events to predict future events. They use many forms of technology as well such as :
weather tracking technologydoppler radarfor collection of dataname the level of organisations
Answer:
organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.
Explanation:
Use the following template strand of DNA and the coding table to determine the correct amino sequence and write this sequence below. Disregard any modifications of mRNA that may occur.
3’ –(Promoter) T A T A T C T A C G G T C C G G C A T C G A T T T C G - 5’
DNA and RNA have the main difference in the presence of deoxyribose sugar in DNA and ribose sugar in RNA. One more is the presence of thymine in DNA while the presence of uracil in RNA.
What is the codon?Codon is actually a three-letter code which is a sequence of three consecutive nucleotides in a DNA or RNA molecule which generally codes for a specific amino acid.
The DNA sequence given here is:
T A T A T C T A C G G T C C G G C A T C G A T T T C G
So the RNA sequence for this will be:
A U A U A G A U G C C A G G C C G U A G C U A A A G C.
So according to the table, the amino-acid sequence will be:
Isoleucine STOP Methionine Proline Glycine Arginine Serine STOP Serine.
Generally stop codon is responsible for the termination of protein synthesis.
Thus, this was the amino acid sequence for mRNA according to the given DNA sequence.
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Zandile set up the following apparatus to investigate how temperature affects transpiration rate what is the name of this apparatus
There is direct relationship between temperature and transpiration.
How temperature affects transpiration rate?Temperature plays an important role in the rate of transpiration. As the temperature increases, transpiration will increase due to warm air that change the state of water from liquid to gaseous state.
Potetometer is an Instrument that is used for measuring the Transpiration of water in plants.
So we can conclude that there is direct relationship between temperature and transpiration.
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what is the correct way to write the scientific name of the mustard ? pls help me to solve this problems.
Answer:
Sinapis alba. (Yellow mustard)
The scientific name of yellow mustard is Sinapsis alba and that of Indian mustard is Brassica juncea.
What is the scientific name?The scientific name is the name that is accepted internationally as the name of the organism.
What is the need of a scientific name?An organism in different part of the world is known by different names therefore it creates a confusion.Hence a common name is accepted universally as the scientific name of that organism.What is binomial nomenclature?It is a system of naming species by giving them two parts.One is known as the generic name and the other is known as the species name.What are the rules to write a scientific name?The generic name should begin with the capital letter while the species name begins with the small letter.The names are always written in italics.The species name is never capitalized.To learn more about scientific name, generic name and species name here,
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According to the theory of natural selection, what would happen to a species of lizards when a new predator is introduced into the environment where lizards live?
The diagram shows a person holding a bow and arrow.
A person holds a bow and arrow with the arrow pulled back.
Which will most likely increase the kinetic energy in this system?
pulling farther back on the string
releasing the string
holding the arrow higher
decreasing the mass of the arrowm
Answer:
pulling further back on the string
Explanation:
I chose that because as for me answer 2 and 3 don't make sense but as for answer four I don't think that when you decrease the mass of the arrow this will increase the kinetic energy because for it to move faster I'll have to pull the string harder or to enlarge it ,so to increase the kinetic energy it is just determined by how I pull that string ."have I enlarged it or it is still loose."
Which of the following is MOST likely to be a direct environmental effect of air pollution?
A: Extended visibility
B: Acid deposition
C: Increased turbidity
D: Eutrophication
A: Extended visibility
B: Acid deposition
C: Increased turbidity
D: Eutrophication
The correct is B
WHy do the United States had a federal type of government
Answer: Is the explanation
Explanation: To keep the U.S under control so the other countries don't attack
and also collect tax.
Human blood is considered a multiple allele trait meaning an individual can have either (A,
B, AB, or O). Which phenotypic probability would be expected between a cross of a male
with Type O and woman with Type AB?
a. 50% Type A, 50% Type B
. b. 50% Type A, 50% Type O
50% Type AB, 50% Type 0
d. 50% Type B, 50% Type O
c.
Answer:
A. 50% Type A, 50% Type B
Explanation:
To answer this we can draw a punnett square.
Since o if recessive, it can only be expressed if it is not masked by a dominant allele. Therefore the male with type O blood has the genotype oo. A and B are co-dominant, so the woman has genotype AB.
_ | A | B
o |Ao | Bo
o | Ao | Bo
Since A and B are dominant alleles, they will mask the o allele. Therefore genotype Ao will be a Type A phenotype, and genotype Bo will be a Type B phenotype.
Therefore, the phenotypic probabilities for this cross is 50% Type A, 50% Type B. Hence, the answer is A.
Hope this helped!
City water management is analyzing water samples from the local river for water pollutants that could be toxic to humans if found in drinking water. Their collection data is below.
Samples
Location
Nitrates
Carbamates
1
Two miles downriver from drinking water uptake facility
12 mg/L
0.06 mg/L
2
One mile downriver from drinking water uptake facility
9 mg/L
2 mg/L
3
One mile upriver from drinking water uptake facility
8 mg/L
0.04 mg/L
4
Two miles upriver from drinking water uptake facility
10 mg/L
0.05 mg/L
Toxic levels reached when nitrates are greater or equal to 10 mg/L and/or carbamates are greater or equal to 0.04 mg/L.
Which sample location(s)have nitrates or carbamates at toxic levels that could be collected by the water uptake facility?
Samples 1, 2, 4
Samples 1 and 4
Samples 3 and 4
Only sample 4
Aquatic toxicity is found in the four sample sites. But since the water uptake facility collects water from upriver, the correct option is C. Samples 3 and 4.
What is aquatic toxicity?Aquatic toxicity is the property of a substance to causes harmful effects on aquatic or water-dependent organisms.
Aquatic toxicity can be either,
Sharp ⇒ nocive effects after a short exposition periodCronic ⇒ nocive effects after a long exposition periodAquatic toxicity depends on the substance type and its concentration in water.
--
According to the problem statement, toxic levels are reached when
nitrates are greater or equal to 10 mg/Land/or
carbamates are greater or equal to 0.04 mg/L.Sample 1 ⇒ Two miles downriver from drinking water uptake facility
Nitrate → 12 mg/L ⇒ > 10 mg/L ⇒ toxic Carbamate → 0.06 mg/L ⇒ > 0.04 mg/L ⇒ toxicSample 2 ⇒ One mile downriver from drinking water uptake facility
Nitrate → 9 mg/L ⇒ < 10 mg/L ⇒ not toxic Carbamate → 2 mg/L ⇒ > 0.04 mg/L ⇒ toxicSample 3 ⇒ One mile upriver from drinking water uptake facility
Nitrate → 8 mg/L ⇒ < 10 mg/L ⇒ not toxic Carbamate → 0.04 mg/L ⇒ = 0.04 mg/L ⇒ toxicSample 4 ⇒ Two miles upriver from drinking water uptake facility
Nitrate → 10 mg/L ⇒ = 10 mg/L ⇒ toxicCarbamate → 0.05 mg/L ⇒ > 0.04 mg/L ⇒ toxicThe four sample sites have toxic levels. Both of the substances concentrations or at least one of them reaches the toxic level at each site.
However, since water uptake facility can colect water from upriver, we only need to consider these sample sites.
The correct option is C. Samples 3 and 4.
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Answer:
b
Explanation:
PLEASE HELP ASAP i need this answer and it would really help!
Answer: D
Explanation:
The oven probably isn’t cooking right because the temperature strength is not as strong as the average oven.
Brain is most active during which portion of sleep cycle
The Brain is most active during REM sleep portion of sleep cycle. This portion of sleep cycle usually occurs for two hours, and when monitored, it is discovered that brain activity is mostly dynamic at this stage.
What is REM sleep?REM stands for Rapid Eye Movement and this is a stage in the sleep cycle of mammals and birds characterized by random rapid movement of the eyes.
Basically, sleep is divided into four major stages which include
AwakeLightDeepREM sleepThe first three stages of sleep are regarded as Non-Rapid Eye movement (NREM) stages. The first three stages comprises of about 75% of the total sleep time.
This movement of the eyes is followed by minimal muscle tone throughout the body, and the higher probability of the sleeper to dream vividly.
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Which of the following is the correct pairing of the psychological perspective and therapy treatment?
o Humanism and Psychotherapy
o Psychodynamic and Token Economy
o Behaviorism and Client-Centered Therapy
o Cognitive and Rational Emotive Therapy
Answer:
humanism and psychotherapy
Are shoebills tertiary consumers?
Answer:
Yes, they are!
Explanation:
While inhabiting marshy areas, the Balaeniceps rex is found to be both a secondary and tertiary consumer preying on fish ranging in size from that of Large Mouth Bass to the small Pacific Herring, and other aquatic organisms such as frogs similar to the Red Eyed Tree Frog
A Foucault pendulum provides evidence that
Earth
(1) orbits the Sun
(2) has a nearly spherical shape
(3) is tilted on an axis
(4) spins on an axis
Answer:
The answer is 4) spins on its axis if it is wrong then tell me tho oaky
This photo shows a kind of reproduction.
Which statement describes the result of this type of reproduction?
Two parents are required to produce the offspring.
Each offspring has a different combination of genes.
Parents make reproductive cells with only half of their genes.
The offspring have identical genes.
Answer:
I don't know
Explanation:
I think the answer???
William Shakespeare's writings are thought to be a perfect example of which of the following? A. The Reformation B. The Enlightenment C. The Renaissance
Explanation:
The Renaissance because and The enlightenment
Reformation is a religious revolt
Which direction do molecules move across a membrane based on concentrations inside and out of the cell?
Write the complementary DNA sequence
GAA TCG AGT
Answer:
CTT AGC TCA
Explanation:
Opposite DNA molecules pair with each other
Adenine (A) pairs to Thymine (T)
Cytosine (C) pairs to Gaunine (G)
What is the best definition of a natural resource?
Something that will decompose
A naturally occurring substance that can be used in some valuable way
Something that can be used without technology
Something that is created by humans to look natural
Answer:
The best definition of a natural resource is a naturally occurring substance that can be used in some valuable way.
Please help me with this
Answer:
DNA: thymine, deoxyribose, large molecule, stay in the nucleus
RNA: single strand, uracil, leave the nucleus, small molecule
Explanation:
As for single strand, it's well known that DNA has two strands while RNA has one.
For the description that asks about thymine, you have to remember the nucleotide bases in DNA and RNA. Remember that DNA's bases are A, C, T, and G, while RNA has all the same bases except for T (which stands for thymine). In RNA, the thymine is replaced with uracil, usually abbreviated as U. That sorts out the descriptions that ask for thymine and uracil.
To figure out the one that asks for deoxyribose, remember that DNA has deoxyribose and RNA has ribose (hence why DNA is deoxyribonucleic acid while RNA is just ribonucleic acid.)
For the large molecule/small molecule ones and the questions that ask about the size of the molecule, remember that DNA is a way bigger molecule than RNA and that RNA is small enough to leave the nucleus, while DNA is much too valuable to the cell to be able to leave the nucleus.
Hope this helps!
In the 1950s tall smokestacks for large factories were constructed and pollution was released higher in the atmosphere where winds were stronger. The motto during this time was "dilution is the solution to _______."
A: Motion
B: Pollution
C: Evelution
Answer:
Pollution
Explanation:
What is Dilution
Dilution is the process of decreasing the concentration of a stock solution by adding more solvent to the solution. The solvent added is usually the universal solvent, known as water.What is pollution
the addition of undesirable material into the environment as a result of human activities.What is motion
when an object changes in position over time relative to a reference point. speed.What is Evolution
Evolution is change in the heritable traits of biological populations over successive generations.Which of these agencies classifies hazardous materials into 9 primary classes?
A: Department of Transportation (DOT)
B: Endangered species Association (ESA)
C: National park service (NPS)
D: U.S. forest service
Answer:
A: Department of Transportation (DOT)
Explanation:
Seems like DOT does it.
https://www.fmcsa.dot.gov/regulations/enforcement/nine-classes-hazardous-materials-yellow-visor-card
https://www.faa.gov/hazmat/what_is_hazmat
Answer:
D.It is theDepartment of Transportation(DOT)
What is a front?
-Air Masses and Fronts 9th grade science-
HELP ASAP
A air front is typically a transition zone between two unique temperature/humidity. Usually, one front would push the other away (typically if summer is hot, then the warm front will push away the cold, and for the winter, if it's cold, it's the opposite).
A stationary front, on the other hand, is when there is no change in the over all temperature for the region(s), and a occluded front is when the fronts mix, where it is followed by rain and a equillibrium of the temperature, whether to a warmer or cooler overall temperature.
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