6. What is the main function of the green pigments (chlorophyll a & b)?
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Answer and Explanation:
Chlorophyll a is the most used photosynthetic pigment and absorbs blue, red and violet wavelengths in the visible spectrum. It participates mainly in oxygenic photosynthesis in which oxygen is the main byproduct of the process. Chlorophyll b primarily absorbs blue light and is used to complement the absorption spectrum of chlorophyll a by extending the range of light wavelengths a photosynthetic organism is able to absorb.
Both of these chlorophyll molecules capture light energy and transfer it to the reaction center of the cell. Henceforth, electrons are passed from this absorbed light energy to water molecules resulting in the formation of hydrogen ions and oxygen atoms.
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Temperature can weather rocks because _____.most rocks do not absorb heat evenly water contracts when it freezes heat can cause minerals to oxidize rocks usually melt in the hot sun ---- When wet rocks dry out, they can crack and break. This process, called slaking, is an example of what? chemical weathering physical weathering water erosion wind erosion ----- In which of the following locations would chemical weathering happen most quickly? Amazon rainforest Sahara desert North Pole Great Plains ----- Which of the following is an example of chemical weathering? A river carrying dirt into a lake. Wind carrying sand from a beach. Chemicals in water dissolving minerals in rock. Friction between two rock surfaces grinding away minerals. ---- Choose all the answers that apply. Erosion: can damage aquatic ecosystems removes fertile topsoil can decrease revenue from agriculture is caused mainly by wind and water is the breakdown of rock and other material ---- Choose all the answers that apply. Erosion can be reduced by: contour plowing putting up fences planting trees removing topsoil --- Which of the following statements is true? Since the Dust Bowl, erosion has not been a problem in the United States. The most fertile part of soil is found a few feet below the surface. Runoff happens when the ground cannot absorb anymore water. Oxidation happens when carbonic acid gains electrons from oxygen. ---- PLEASE HELP 911
In which level of the atmosphere is ozone concentrated? A)mesosphere B)troposphere C)stratosphere D)thermosphere
A fox hunts a rabbit. When the fox captures the rabbit, he consumes it. What is the primary reason for this organism interaction?
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Answer:
Nitrogen like other elements is cycling between air and soil in different forms.
Explanation:
When Nitrogen is in the air, there are some specialized bacteria (Nitrogen fixing bacteria) which are capable of transform gas Nitrogen in "solid" Nitrogen that can be asimilated by plants, these bacteria are asociated with plants and live in symbiosis in their roots. Nitrifying bacteria can also transform the Nitrogen in the air and fix it into the soil and denitrifying bacteria can transform soil Nitrogen ,in atmospheric Nitrogen which is present in the air to keep the Nitrogen cycle.
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B.metamorphosis
C.lifespan
D.aging
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Hope it helped!
Does this help?
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Answer: Chromosomes are made up of tightly wound Chromatin.
Explanation: Chromatin is wrapped around proteins called histones to make DNA and then DNA is tightly wound up and that is how you make chromosomes.
short, and TT & Tt = tall)
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Answer:
A punnet square is a diagram which is made to illustrate the percentages of the traits that will be passed on from the parents to the offsprings.
If jenny crosses a heterogenous tall dominant pea plant with a short homozygous pea plant then 50 percent of the offsprings will be short.
If Jenny crosses a tall, dominant homozygous pea plant with a short homozygous pea plant then all of the offspring will be tall and heterogenous dominant
Answer:
Twenty five percent
Explanation:
Let us assume that the allele for tall pea plant be "T" and the allele for short pea plant be "t".
Also let us assume that "T" is dominant over "t"
A hybrid pea plant will have both the allele for tall and short plants.
Thus, genotype of hybrid pea plant would be "Tt"
Now if two hybrid pea plants are crossed, then following offspring are formed -
Tt * Tt
TT, Tt, Tt, tt
Thus, out of four only one offspring having "tt" genotype will produce short pea plants.
Thus, probability is equal to
%