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BaLLatris [955]
2 years ago
14

What assumptions did Engelmann make in order to conclude that red and violet-blue light were more effective than green light in

driving photosynthesis? Select the two that apply
Biology
1 answer:
iren [92.7K]2 years ago
6 0

Answer:

The distribution of chloroplasts in each algae cell was approximately the same.

The number of bacteria grouped at each wavelength (color) was approximately proportional to the amount of oxygen produced by this part of the algae.

Explanation:

Photosynthetic pigments absorb blue, red and green lights. The wavelength of light that is the most effective in driving photosynthesis is 420 nanometers, which corresponds to blue light.

The wavelength of 475nm and 650nm are most effective in driving photosynthesis.

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The biodiversity of cultivated crops is currently under threat from industrial
DENIUS [597]

Answer:

The wastes or run off of the industrial farming enters the water and nearby cultivated crops, this waste consist of chemicals and pesticides mostly, that are the cause of destruction of not only the cultivated crops but also the useful soil-borne rhizoshpere bacteria too. On the other hand climate change impacting from emission of greenhouse gases, increase air pollution and also cause deforestation. Such circumstances could all lead to the extinction of important crops.

In order to avoid these problems, proper waste management systems should be developed to dispose the waste of industries and others at area that is far from the population or cultivation. The climate change resulting from the pollution could be avoided by the use of filtered products for the smokes, so that filter could absorb harmful substances and the smoke released in air would not be that much toxic. Moreover, there is the need to identify and grow such crops that can adapt these environmental changes.

3 0
2 years ago
Read 2 more answers
How does the author’s use of details convey her point of view about Eleanor Roosevelt’s life and legacy?
Vera_Pavlovna [14]

Author's use of details convey to Eleanor Rossevelt life and legacy are described below.

Explanation:

1.She advocated for expanded roles for women in the workplace, the civil rights of African Americans and Asian Americans, and the rights of World War II refugees. Following her husband's death in 1945, Roosevelt remained active in politics for the remaining 17 years of her life.

2.The fireside chats were a series of evening radio addresses given by U.S. President Franklin D. Roosevelt (known colloquially as "FDR") between 1933 and 1944.

3..President Theodore Roosevelt, an Oyster Bay Roosevelt, was the uncle of Eleanor Roosevelt later wife of Franklin Roosevelt. Despite political differences that caused family members to actively campaign against each other, the two branches generally remained friendly.

4.Champions of Human Rights. Eleanor Roosevelt (1884–1962)

  • Continuing her work on behalf of all people, she advocated equal rights for women, African-Americans and Depression-era workers, bringing inspiration and attention to their causes.

7 0
2 years ago
Ftsz, mreb, and cres proteins regulate the shape and structure of bacterial (prokaryote) cells. these proteins are homologous to
Makovka662 [10]
Ftsz, mreb, and cres ,proteins regulate the shape and structure of bacterial prokaryotic cells. These proteins are homologous to the Cytoskeleton in eukaryotes. Homologous meaning they have the same evolutionary origin but not necessarily having the same function. Cytoskeleton forms a framework for the movement of organelles around the cytoplasm, most organelles are attached to the cytoskeleton. 
3 0
2 years ago
Frank counts 56 maple trees living on a 20-acre tract of land, and the data allows him to calculate the of the maple trees on th
frozen [14]

Answer:

population density

population distribution

age structure

Explanation:

if we look at this question; it looks glaring that it correlates with a fill in the blank type of question.

So, from the question:

Frank counts 56 maple trees living on a 20-acre tract of land, and the data allows him to calculate the <u>population density</u> of the maple trees on the land.

In an ecological succession, population  density refer to species of  a common genera in specific geographical setting. It helps to measure the exact number of organism inhabitant a unit area of a place.

He observes that most of the maple trees grow closely together in groups of 6 to 8 trees, which describes the <u>population distribution. </u>

Population distribution is the spread of organism over a region in a geographic ecological setting. The pattern of distribution of organism may be uniform , in some  organism they are largely dispersed and in some they are clumped together.

The<u> age structure </u>of the maple trees shows the percentages of trees of different ages.

The age structure is also a term used in ecology which is normally use to predict the proportion of growth of organisms. Age structure  of  species in the environment speaks volume about their  distribution of age.

7 0
2 years ago
Describe the first step that may have led toward cellular organization
Katarina [22]

formation of microspheres might have been the first step toward cellular organization( found this somewhere)

8 0
2 years ago
Read 2 more answers
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