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miss Akunina [59]
3 years ago
9

how did the formation of free oxygen from photosynthesis and the development of the ozone layer stop abiogenesis

Biology
1 answer:
inn [45]3 years ago
7 0

This solar energy conversion process is known as photosynthesis. ... At this time, the oxygen level was approximately 10% of its present atmospheric concentration. ... The presence of ozone enabled organisms to develop and live on the land.

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When Jenner developed the first vaccine he was using the observation of milk maids who_______
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Caught cow pox from cows
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3 years ago
Why might is be useful for climatologists to group areas with similar cimate zones? (Written response question)
spin [16.1K]
This might be useful cause it’s useful and it’s also useful and I hope this is useful you’re welcome for being useful :)
3 0
3 years ago
Genetic engineering can be used to disrupt specific genes in the genome of an organism. Predict how the browning of apple slices
adell [148]

Answer: Fruit will not brown. Browning requires a functional enzyme.

Explanation:

Genetic engineering refers to the manipulation of an organism's genes. Scientists use a variety of molecular tools and techniques to cut up and join genetic material from different species and to introduce this new hybrid DNA into another organisms. <u>The overall goal is to add or remove an organism's genetic makeup for the better, or to transfer DNA code from one species into the other, in order to form new combinations or heritable genetic material.</u>

Enzymatic browning is a reaction that occurs in fruits which results in negative effects on characteristics such as taste, color, and nutritional value. This reaction is a caused by phenolic compounds' oxidation by an enzyme called polyphenol oxidase, which causes the generation of dark pigments. This is often seen in apples which are rich in this enzymes and susceptible to this enzymatic browning.

If through genetic engineering, the gene encoding the enzyme responsible for the apple browing is removed, then this enzyme cannot be produced by the apple. Consequently, apples will not brown<u>,</u> because there will not be a polyphenol oxidase that oxidates the phenolic compounds.

4 0
3 years ago
Convert 16.45 m into Kilometers
Yakvenalex [24]

Answer:

0.01645 KM

Explanation:

1000 M = 1 KM

16.45 / 1000 = 0.01645

<u><em>Hope this helps!</em></u>

7 0
3 years ago
Read 2 more answers
What is the maximum mass of S8 that can be produced by combining 77.0 g of each reactant?
g100num [7]
The balanced equation is
<span>8SO2 + 16H2S ----> 3S8 + 16H2O
</span>so
77g SO2 / 64g/mole = 1.203moles  of SO2 
<span>77g H2S / 34g/mole = 2.26moles  of H2S 
</span>now 

<span>1.203 moles SO2 yields 3/8x amount that is = 0.456moles  of S8 
</span>so
<span>2.06moles H2S yields 3/16x amount = 0.386moles of S8 
</span>hence
H2S = produce  only 0.386moles  of S8 = 98.98g S8
hope it helps
5 0
3 years ago
Read 2 more answers
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