Answer: A Plinian eruption ejects a column of tephra high into the atmoshpere (tephra refers to any material that is ejected from a volcano into the atmosphere), creating a form similar to the mushroom cloud of a nuclear explosion. A Plinian eruption of Vesuvius began at midday on 24 August 79 AD created a Plinian column approximately 20 km (66,000 feet) high.
Explanation:
Plss Anyone wanna help?
Answer:
T is the answer!!!!!!!!!!!!!!!
Explanation:
Assessment started: undefined.
Item 1
Which formula is an ionic compound?
NaF
N2
NO2
CO2
Answer:
NaF I took the test, hope this helps. :)
Explanation:
NaF is an ionic compound. Ionic compounds have ionic bonds between the molecules.
What is ionic compound?Because each atom contains a particular combination of protons, neutrons, and electrons, each atom is singular. An atom typically has the same number of protons and electrons.
And while the number of protons in an atom can never vary because doing so would result in the presence of an entirely other element, the number of electrons can occasionally shift.
Adding or taking away electrons from an atom alters the charge of the atom since electrons have a net negative charge by themselves. This is due to an imbalance between the number of protons, which have a positive charge, and the number of electrons.
Therefore, NaF is an ionic compound. Ionic compounds have ionic bonds between the molecules.
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How is a compound different than the elements that make up the compound ?
Answer: An element is a material that consists of a single type of atom.
Explanation: Chemical bonds link elements together to form more complex molecules called compounds. A compound consists of two or more types of elements held together by covalent or ionic bonds.
CAN SOMEONE PLEASE HELP ME WITH THIS SCIENCE QUESTION THANK YOU !!!
Answer:
economic
Explanation:
A solar eclipse occurs when Earth passes into a __________ moon's shadow. A lunar eclipse occurs when a _________ moon passes into Earth's shadow.
A. crescent; gibbous
B. gibbous; crescent
C. new; full
D. full; new
Answer:
answer might be d
hope it helps you : )
Explanation:
How much land do farms take up in the United States?
over half of all the land in the nation
half of all rural land
less than half of the Midwest
half of all the land in the lower 48 states
Answer: Source: USDA NASS, 2012 Census of Agriculture. changed little, declining from 922 million acres in 2007 to 915 million acres in 2012 (or 40.8 percent of U.S. land to 40.5 percent). The average size of U.S. farms in 2012 was 434 acres, 4 percent larger than five years earlier.
Food production takes up almost half of the planet's land surface and threatens to consume the fertile land that still remains, scientists warn. The global impact of farming on the environment is revealed in new maps, which show that 40 percent of the Earth's land is now given over to agriculture.
over half of all the land in the nation
Explanation:
Answer: over half of all the land in the nation
Explanation:
just did it
in which generation gametophyte or sporophyte do the following belong
Explain Why do organisms that perform photosynthesis require water and sunlight?b
Answer:
To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight. for photosynthesis. The energy from light causes a chemical reaction that breaks down the molecules of carbon dioxide and water and reorganizes them to make the sugar (glucose) and oxygen gas.
Explanation:
Hope this helps :)
Organisms that perform photosynthesis require water and sunlight - The energy from the light causes a chemical reaction that breaks down the molecules of carbon dioxide and water and reorganizes them to make sugar (glucose) and oxygen gas.
PhotosynthesisWater and carbon dioxide are used in organisms that photosynthesize.The reactants in this equation are used to generate glucose needed for photosynthetic organisms to be able to respireThe energy from the light causes a chemical reaction that breaks down the molecules of carbon dioxide and waterOxygen provides electrons by the energy of sunlightLearn more:
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20. A specific enzyme is involved in a certain body reaction. What will most
likely happen if the enzyme is not available? *
A different enzyme will be used in the reaction.
The rate of the reaction will change.
Different chemicals will be used in the reaction to replace the enzyme.
Coenzymes will produce the enzyme
Answer:
The rate of the reaction will change
Explanation:
English
Page 1
Page 2
List three ways in which Japan and Great Britain are
similar
The geographical features of Japan have much in
common with those of ancient Hellas (Greece). In
both there is the same combination of mountain,
valley, and plain, [and] a deeply indented
coastline, with its bays, peninsulas, and islands
off the coast. Few places inland are far removed
from the mountains, and none are really distant
from the sea. ... The land was on all sides well
protected, and yet also open to the sea; and in
each case, too, there was free access for
commerce and civilization from early times....
The deeply indented coastline of Japan provides
a number of excellent harbors on the Pacific
coast, and its shores abound in fish of all kinds,
the rich supplies of which have for centuries
Done
Answer:
Both England and Japan were island nations and, as a result, were easily defendable. They both had many ports and good access to the ocean. Both were commercial powers and had strong navies.
Explanation:
trust
The three ways in which Japan and Great Britain are similar as Both England and Japan were island nations and, as a result, were easily defendable. They both had many ports and good access to the ocean. Both were commercial powers and had strong navies.
What are the main features of Japan?
Japan is an island nation, it has a stratovolcanic archipelago which has been composed of about 1,042 islands, and more than 2,000 islets that has been extend just along the east Asian coast of the Pacific Ocean.
This country has been located in one of the geologically most unstable and complex areas of the Earth as well asthe Pacific Ring of Fire, therefore it has the highly seismic zone. The geographical features of Japan have much in common with those of ancient Hellas (Greece). In both there is the same combination of mountain, valley, and plain, [and] a deeply indented coastline, with its bays, peninsulas, and islands off the coast.
Therefore, They both had many ports and good access to the ocean. Both were commercial powers and had strong navies.
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After pollen lands on the stigma of a flower, which of the following happens first?
Fertilization takes place.
An embryo grows inside the ovary.
The pollen grows a tube to the ovary.
The pollen units with an egg cell.
Answer:
The pollen grows a tube to the ovary.
Explanation:
After pollen grains land on the stigma, a pollen tube grows from the pollen grain, through the style, and into the ovary. Sperm cells inside the pollen grain travel down the pollen tube and into the ovary which contains the ovules. Fertilization occurs when one of the sperm cells fuses with the egg inside of an ovule.
Answer:
The pollen grows a tube to the ovary.
Photosynthesis can take place both at night and during the day
•false
• true
Answer:
false
Explanation:
Which term means "without the
ability to speak or make sounds"?
Answer:
Muteness
Explanation:
Muteness or mutism (from Latin mutus 'silent') is defined as an absence of speech while conserving or maintaining the ability to understand the speech of others.
5.5 mg equals how many kg
Answer:
5.5e-6 or .0000055
Explanation:
just move the decimal back 6 times to get the answer.
Hope this helps ya! Keep smiling!
Answer:
It equals 6 kg
Explanation:
plzz help me i really need it done ASAP
why is it important that the dna polymerase be heat resistant
Answer: Heat stable DNA Polymerase; heat stability is very important because PCR reaction is performed at various temperatures. This heat stable DNA polymerase is obtained from a thermophilic bacteria Thermus aquaticus, the inhabitant of hot springs. Hence, this DNA polymerase is termed as Taq DNA Polymerase.
DNA polymerase I function to fill DNA gaps that arise during DNA replication, repair, and recombination.
DNA polymerase:t's DNA polymerase is very heat stable and is highly reactive at 70*C. This heat stability makes Taq polymerase ideal for PCR, as high temperature is used repeatedly in PCR to denature the template DNA, or separate its strands. Polymerase activity is strongly influenced by temperature.
Taq DNA polymerase is the most common enzyme used for PCR amplification.
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Each section of DNA that is used to make proteins is called a
Answer:
genes
Explanation:
Which of the following sentences from the article helps prove the claim that living with farm animals can help prevent asthma?
A. Now, their old-fashioned ways are helping scientists learn more about the origins of asthma, a condition that sometimes makes it
difficult to breathe.
B. To understand the reasons for this difference, researchers studied 30 Amish children between the ages of 7 and 14
C. Like the Amish, the Hutterites live in farming communities that limit the use of modern technology like computers and televisions
D. The rich microbes in the Amish dust protected the animals airways, preventing a response.
Answer:
D
Explanation:
Not sure but the sentence is super understamdable
Answer:
i need the article to give the correct answer or else the answer might be a
Explanation:
What type of mutation is shown below original dna- CTACTCGTGGGT Mutated Dna- CTACTCCGTGGGT
Answer:
The type of mutation would be the frame shift mutations
What type of cells does mitosis produce
Gametes
When a cell divides by way of mitosis, it produces two clones of itself, each with the same number of chromosomes. When a cell divides by way of meiosis, it produces four cells, called gametes. Gametes are more commonly called sperm in males and eggs in females.
True or false? A prokaryotic cell is more complex than an eukaryotic cell.
Answer:
False, prokaryotic cell is smaller and less complex, a eukaryotic cell makes their own power plant called mitochondria
Muscle contraction requires lots of energy. Describe the three ways muscle cells generate ATP. Be sure to include which pathway will supply energy the quickest and which will supply energy over the longest period of time.
Answer: Direct Phosphorylation( quickest), Anaerobic Respiration, Aerobic Respiration (longer period of time).
Explanation: The energy which can be used by our body for muscle contractions can be generated by muscles cells in three different ways. These includes:
--> Direct Phosphorylation
--> Anaerobic Respiration and
--> Aerobic Respiration.
DIRECT PHOSPHORYLATION: As ATP is used up, it's re-stocked by the small reserve of energy stored as creatine phosphate. Creatine phosphate very rapidly donates its high-energy phosphate to ADP the moment ADP forms, converting it back to ATP. This extra source of ATP is easily mobilized and is very effective as long as it last. It's limited though because the store of creatine phosphate is small. (Normally the supply of creatine phosphate is re-stocked by oxidative metabolism via the ATP produced by the citric acid cycle, but during intense exercise there is not enough time to do this so the stock is burned in 20-25 sec making it the QUICKEST way to supply energy)
ANAEROBIC RESPIRATION: When oxygen levels in the cells are low, glucose molecules undergoes glycolysis to produce 2 molecules of pyruvic acid( ATP). The pyruvic acid is converted anaerobically to lactic acid. The build up of lactic acid causes the pain and cramps of overexercised muscles. It is a fast but an inefficient way of producing ATP for energy use.
AEROBIC RESPIRATION: This occurs only if the oxygen supply is adequate and is the process by which energy is released during prolonged exercise. It utilizes glucose and glycogen. During the glycolysis process, a glucose molecule is converted to 2 molecules of ATP in the cytoplasm of cell. In the presence of sufficient oxygen, the pyruvic acid enters the citric acid cycle and oxidative phosphorylation giving rise to the by products of 36 ATP, carbon dioxide and water. Aerobic respiration is SLOW (takes the longest period) but efficient process.
Which plant structure(s) belong to the root system?!!!!!!!!!!!!!!!!!!!!!!
Answer:
The root system includes those parts of the plant below ground, such as the roots, tubers, and rhizomes.
Explanation:
Answer:The root system includes those parts of the plant below ground, such as the roots, tubers, and rhizomes.
1.) is this particular trait dominant or recessive? Explain why
2.) individual one has which of the following genotypes? Heterozygous
3.) individual which of the following genotypes heterozygous
Which of the following encloses their DNA in a nucleus?
1. virus
2. bacteria
3. eukaryotes
4. prokaryotes
Answer:
3. Eukaryotes
Explanation:
Transcription is a process that rewrites DNA code into a --
Answer:
DNA can undergo rewriting in a process called transcription. ... RNA polymerase slides along the gene, matching RNA nucleotides to the DNA nucleotides in the gene. Transcribing DNA and processing mRNA within the nucleus of a eukaryotic cell.
You pull your desk along the floor in your classroom. What does this situation best demonstrate?
Potential Energy
An alternate energy source
Gravity
Work
Answer:
Work
Explanation:
Work can be referred to as the application of a force (F) over a distance (d). In other words, WORK is done when an applied force causes a body to move. Hence, work is a product of the force and the displacement in the direction of the force i.e. W = F × d
In this case, a desk is PULLED along the floor in your classroom, this best indicates WORK because a force (pull) is applied on the desk causing it to move over a distance in the direction of the pull.
The dominant allele dimples is D and the recessive allele is d. How would a geneticist describe the genotype of an individual with alleles dd?
A geneticist represents the phenotype of an individual with the alleles dd should be considered as the homo-zygous recessive.
What is Dominant and recessive alleles?In diploid organisms, an individual collected two gene forms or 'alleles' for the same gene locus.
An individual should be considered as the heterozygous at the time when collected two different alleles for the similar gene locus, whereas an individual should be homo-zygous when receives the same alleles for a gene locus.
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If there were six bases in DNA and still only 20 amino acids, how long would a codon need to be in order to specify an amino acid?
Answer:
The codon length would not change.
Explanation:
Codons have 3 bases and normally the DNA has 4, each codon counts for a single amino acid. There are 64 possible codon variations which can be calculated by [tex]4^{3}[/tex].
If there were 6 bases in the DNA than there would be [tex]6^{3} = 216[/tex] codon variation that correspond to the same 20 amino acids but the codon lengths would still be the same.
I hope this answer helps.
Please help it’s urgent!!! For these two question
