composition on photosynthesis
Answer:
The effects on pigment composition and photosynthesis of low temperature during growth were examined in the third leaf of three chilling-tolerant and three chilling-sensitive genotypes of Zea mays L. The plants were grown under a controlled environment at 24 or 14 °C at a photon flux density (PFD) of 200 or 600 μmol m–2 s–1. At 24 °C, the two classes of genotypes showed little differences in their photosynthetic activity and their composition of pigments. At 14 °C, photosynthetic activity was considerably reduced but the chilling-tolerant genotypes displayed higher photosynthetic rates than the chilling-sensitive ones. Plants grown at 14 °C showed a reduced chlorophyll (Chl) a + b content and a reduced Chl a/b ratio but an increased ratio of total carotenoids to Chl a + b. These changes in pigment composition in plants grown at low temperature were generally more pronounced in the chilling-sensitive genotypes than in the tolerant ones, particularly at high PFD. Furthermore, at 14 °C, all the genotypes showed increased ratios of lutein, neoxanthin and xanthophyll-cycle carotenoids to Chl a + b but a reduced ratio of β-carotene to Chl a + b, especially at high PFD. At 14 °C, the chilling-tolerant genotypes, when compared with the sensitive ones, were characterized by higher contents of β-carotene and neoxanthin, a lower content of xanthophyll-cycle carotenoids, a lower ratio of xanthophylls to β-carotene, and less of their xanthophyll-cycle carotenoid pool in the form of zeaxanthin. These differences between the two classes of genotypes were more pronounced at high PFD than at low PFD. The results are discussed in terms of the relationship that may exist in maize between pigment composition and the capacity to form an efficient photosynthetic apparatus at low growth temperature.
Explanation:
Hope it help you.
what are the advantages of saving
Why should you avoid sun exposure between the hours of 10 AM - 2 PM? *
1 point
You should be working on your Science lessons.
The IV rays are the most intense during those times.
The UV rays are the most intense during those times.
The sun's rays are strongest between 10 a.m. and 4 p.m. Limit exposure to the sun during these hours, even in winter and especially at higher altitudes. Do not burn. Sunburns significantly increase the lifetime risk of developing skin cancer, especially for children.
Answer:The UV rays are the most intense during those times.
so C
Explanation:
7. Who do you call a historical personality? Give a few examples.
In 1998, California had forty-five representatives in the U.S. House of Representatives while Louisiana had seven. What accounts for the difference in those numbers?
What was Harriet Martineau’s contribution to sociology?
A) She wrote an analysis of American society
B) She founded the American Sociology Society
C) She started the first settlement house in America
D) She helped formulate the functionalist theory of sociology
6. Igneous rocks form from the
What of magma or lava.
Answer:
Magma.
Hope that helped. x
Answer:
Explanation:
Magma is molten rock that is underground and lava is molten rock that erupts out on the surface. The two main types of igneous rocks are plutonic rocks and volcanic rocks. Plutonic rocks are formed when magma cools and solidifies underground
pro's and con's of decriminalizing drugs to end the war on drug in the US.
Answer:
Pros:
- Addiction treatment, rehabilitation, and recovery programs could potentially be less expensive.
- In Portugal, where drugs were legalized, statistics say that addicts are more likely to find recovery in rehabilation and not jail.
Cons:
- Treatments in modern health care system will not suffice to treat a new potential influx of addicts.
- Prices are estimated to fall because of more supply, so there may be a higher increase of addiction.
Air is a natural resource. Is this statement true or false?
Answer:
the statement is true I hope
There are a lot of natural resources. Air is a natural resource is a true statement.
What is Air?Air is known as a resources that exist in the earth that is, it is a natural resource and one will not be able to exhaust it by human activities.
It is therefore regarded as an inexhaustible natural resource. Other natural resources are sunlight, soil, water, Animals, etc.
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This photo depicts modern-day Cuba. Modern-day Cuba. A 1950's car sits parked along a street. How does this picture illustrate an effect of national security policies against Cuba? It shows that Cubans cannot afford new and modern items. Only necessities such as transportation are available to people. Modern American cars are not available due to trade restrictions. The empty street shows a lack of tourism and travel.
Answer:
Modern American cars are not available due to trade restrictions.
Explanation:
the values important to Confucianism include what
Answer:
respect for parents,loyalty to government,
Explanation:
The imperial family and other notables sponsored the publication of morality books that encouraged the practice of Confucian values: respect for parents,loyalty to government, and keeping to one's place in society—farmers should remain farmers, and practice the ethics of farming.
Why did the colonists use boycotting as a means of protest against British acts?
The British thought boycotts were the vilest response.
It would have the most economic effect.
They had no organized government to send a formal protest.
Boycotts were a way to stir more violence.
Considering the available options, the reason the colonists used boycotting as a means of protest against British acts is that "It would have the most economic effect."
What is Boycott?Boycott is a social term that is used to describe the general withdrawal or refusal to involve in commercial or social relations, usually with a country, organization, government, or person.
Boycott is typically used for punishment or protest. Therefore, the colonist used the boycott as a form of protest against the British rule such that it would affect the economic activities.
Hence, in this case, it is concluded that the correct answer is option B. "It would have the most economic effect."
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True or False: The Coriolis Effect turns wind in the Northern Hemisphere to the right. *
1 point
True
False
This statement is true, the air in the northern hemisphere will turn clockwise(right) and winds in the southern hemisphere will turn counterclockwise(left).
what state do you live in?
Answer:Texas
Explanation:
Which of these is a main political factor that helped bring an end to the American Revolution? Alliance with France Alliance with Germany Loans from Britain Loans from Italy
Answer:
The answer to this question is the alliance with France.
Explanation:
During the American Revolution, the war had been in Britain's favor until the Battle of Saratoga. This battle proved to be a successful American victory which convinced France to ally with Americans. The French had provided supplies, arms, ammunitions, and military support to the American army. This alliance was a main political factor had helped turn the war in favor of America, leading to the eventual independence from Britain.
mention five services village provides
Answer:
Village provides us fresh air. It is free of pollution so we mayno be suffer from any types of respiratory and cardiovascular diseases
Explanation:
Fresh air and water can be found in villages and different woods inorder to cook foods,etc
Answer:
1. People making goods
2. Trading/selling at the marketplace
3. Farming
4. Healthcare
5. Newsagents and post offices.
Hope that helps. x
One result of Australia's free market policies is its
Answer:
One result of Australia’s free market policies is its wide variety of available goods and services.
Explanation:
Please help me as soon as you can,What is inflation?
Answer:
Inflation is the decline of purchasing power of a given currency over time. A quantitative estimate of the rate at which the decline in purchasing power occurs can be reflected in the increase of an average price level of a basket of selected goods and services in an economy over some period of time. The rise in the general level of prices, often expressed as a percentage, means that a unit of currency effectively buys less than it did in prior periods. Inflation can be contrasted with deflation, which occurs when the purchasing power of money increases and prices decline.
Explanation:i hope this helps you <3.
Jane is a 57 y/o female whose husband of 35 years just passed away in the past 6 months. Jane comes to the clinic and says: "I cry all the time. I can’t sleep, I have no energy, I have lost 20 pounds in the past 2 months, and I get easily agitated. What’s wrong with me
The symptoms Jane narrated she is experiencing after the death of her husband shows that Jane is suffering from: major depression.
We naturally and normally feel sad and down occasionally due to life's changes that unpalatable. However, when the feeling of sadness gets prolong that it affects our daily life, it is a sign that clinical depression has set in.
One of the various types of depression is known as Major Depression. It is characterized with the following symptoms:
Loss of interest in your daily activities.Loss of weight.Trouble with sleeping.Tiredness and mostly without energy.Mental and physical sluggishness.Thus, the symptoms Jane narrated she is experiencing after the death of her husband shows that Jane is suffering from: major depression.
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Which political trend do the maps show in the United
States from 1848 to 1860?
OA.
nationalism that kept the Northern states in the
Union
ОВ.
an increase in Northern support of the Democratic
Party
OC.
an increase in Southern support of the Democratic
Party
OD.
sectionalism that led to the secession of the
Southern states
Answer:
D
Explanation:
Over the time period leading to the Civil War, the concentration of Republicans in the north and democrats in the south increased
What did the kush child do
Who was Nelson Mandela??
Answer:
Nelson Mandela was a South African leader who was tried for treason by the white South African government. he and seven other leader were sentenced to life imprisonment in 1964, for during to oppose the apartheid regime in his country. He spent the next 28years in Robben Island, South Africans most dreaded prison.
Which of the following is NOT part of our solar system?
the Milky Way
the moon
Jupiter
the sun
Answer:
The Milky Way.
Explanation:
Our solar system is part of the Milky Way, not the other way around. The Milky Way encompasses a much larger area as compared to our solar system.
which one is it? HMMM look at the pic to see the question
Answer:
B. mixture 2
Explanation:
I believe it would be B. because it is the only mixture where nothing would dissolve into the water, and both of the other components would also not combine. Hope this helped, good luck!
Dragon
If you were poor, who was responsible for educating your family in ancient Rome?
Which statement best summarizes the Declaration of Independence?
AColonial governments had more authority than the British government.
BThe colonies should be allowed to manufacture goods and trade freely.
CAll people are entitled to liberty, property, security, and resistance to oppression.
DThe colonies broke from Great Britain because the monarchy abused colonists’ rights.
Answer:
C
Explanation:
The Declaration of Independence stated "We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness."
Thus people are entitled to liberty,property,security, and the ability to resist.
Hope this helps! Wishing you the best,
Elliott B.
7th grade
Answer:
D ; The colonies broke from Great Britain because the monarchy abused colonists’ rights.
Explanation:
I just took the test
8. What do you think was the reaction of the British troops? What was so significant about
General Washington's escape?
Answer:
Washington crossed the Delaware River so that his army could attack an isolated garrison of Hessian troops located at Trenton, New Jersey. ... Washington hoped that a quick victory at Trenton would bolster sagging morale in his army and encourage more men to join the ranks of the Continentals come the new year.
Explanation:
Correct me if i'm wrongthank you
what is the impact of conflict on sales and it's management
Answer:
it slows down development
The French and Indian War broke out over claims to the:
Mississippi River valley
Mohawk River valley
Hudson River valley
Ohio River valley
Answer:
ohio river valley
Explanation:
What innovations did China have that were also present in Egypt or Mesopotamia?
Answer:
Papermaking, printing, gunpowder and the compass
Explanation: The four great inventions of ancient China-are significant contributions of the Chinese nation to world civilization. China was the first nation to invent paper.