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Mars2501 [29]
3 years ago
11

Composition on photosynthesis​

Social Studies
1 answer:
vladimir1956 [14]3 years ago
3 0

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:

<em>Hope it help you.</em>

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Government role in the community development process is often an uncertainty as each community has its own opinion on the matter. The inclusion of government, on whatever level, is always a possibility with community development and it's a viable option for those going through the process.

6 0
2 years ago
Which file is used when it is necessary to run a program, but no printer is available?
tatiyna

Report file is used when it is necessary to run a program when no printer is available.

Printers are one of the common computer output devices used to produce printed papers from the computer. The 2D printers are used to print text and graphics on a paper, and 3D printers are used to create three dimensional physical objects. Three most common types of printers are multi-functional, inkjet and laser printers.

Report file is used to store comparatively permanent records extracted from the main file or generated when process. To create a report file, in navigation pane click on table than on the create tab click in the reports group, click on Report.

To learn more about Printers here

brainly.com/question/17136779

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4 0
2 years ago
What made the end of apartheid a success or a falure? Why?
stiks02 [169]
<h2>The End of Apartheid</h2>

Apartheid, the Afrikaans name given by the white-ruled South Africa's Nationalist Party in 1948 to the country's harsh, institutionalized system of racial segregation, came to an end in the early 1990s in a series of steps that led to the formation of a democratic government in 1994. Years of violent internal protest, weakening white commitment, international economic and cultural sanctions, economic struggles, and the end of the Cold War brought down white minority rule in Pretoria. U.S. policy toward the regime underwent a gradual but complete transformation that played an important conflicting role in Apartheid's initial survival and eventual downfall.

Although many of the segregationist policies dated back to the early decades of the twentieth century, it was the election of the Nationalist Party in 1948 that marked the beginning of legalized racism's harshest features called Apartheid. The Cold War then was in its early stages. U.S. President Harry Truman's foremost foreign policy goal was to limit Soviet expansion. Despite supporting a domestic civil rights agenda to further the rights of black people in the United States, the Truman Administration chose not to protest the anti-communist South African government's system of Apartheid in an effort to maintain an ally against the Soviet Union in southern Africa. This set the stage for successive administrations to quietly support the Apartheid regime as a stalwart ally against the spread of communism.

4 0
3 years ago
Which sociological perspective would view society as a living organism in which each part of the organism contributes to its sur
natulia [17]

Answer:

The answer is the Funcionalism

Explanation:

Its main objective is to explain society, collective and individual actions, from causalities, ie, functions. Thus society, or what is observed from this theory, is understood as an organism, composed of related organs and with specific functions. Formulated by Emile Durkheim, his interest was to understand what are the defining factors of a society, that is, what makes a society not just a collection of individuals.

3 0
4 years ago
On December 23, 2015, at 3:30 pm, the three utilities began to receive thousands of bogus telephone calls appearing to originate
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Answer:

This type of attack, which attempts to overwhelm systems with data is know as:

Distributed Denial of Service Attack

Explanation:

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It is an attack on a computer or a network system to steal information, change something on a computer, gain unauthorized access to a system.

There are many types of cyber attack and one of them is

Distributed Denial of Service Attack:

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In our case, the utilities received thousand of bogus calls as attacker overwhelmed the utilities so that customers can't report real response so which is distributed denial of service cyber attack.

7 0
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