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faust18 [17]
3 years ago
6

What is the current theory of the origin of life

Biology
1 answer:
DerKrebs [107]3 years ago
5 0
The origin of life<span> on Earth is a set of paradoxes. In order for </span>life<span> to have gotten started, there must have been a genetic molecule something like DNA or RNA capable of passing along blueprints for making proteins, the work horse molecules of </span>life<span>.</span>
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If 1000 f2 offspring are obtained, how many flies of each phenotype are expected?
aniked [119]
<span>In Drosophila + indicates wild-type allele for any gene, m is mahogany and e is ebony. Female parents are m+/m+ and males are +e/+e. F1 are m+/+e, all wild type. F1 females are crossed with me/me males - the test cross. Offspring will be : non recombinant m+/me, mahogany wild type or +e/me wild type ebony. OR recombinant me/me mahogany ebony or ++/++ wild type. As the two genes are 25 map units apart, the percentage of recombinants will be 25% and therefore percentage parental types will be 75%. 75% 1000 is 750. There are two parental types, so you would expect 375 of each. Therefore, you would expect 375 m+/me and 375 +e/me. 25% of 1000 is 250 split between two recombinants =125 of each. Therefore you would expect 135 me/me and 125 ++/++</span>
7 0
3 years ago
The blunt, cartilaginous, lower<br> tip of the sternum
LekaFEV [45]
Should be called the Manubrium!
4 0
2 years ago
The two layered sac that covers the heart is the
Liula [17]
The two-layered sac surrounding the heart is the pericardium.
Hope this helps!


7 0
3 years ago
Why is chlorophyll not able to capture the energy in green light​
mariarad [96]

All plants have chlorophyll-a which blocks(reflects) green light and absorbs red and blue wavelengths. It seems like it would be more efficient for plants to absorb green light since energy is most powerful from the sun through green wavelengths. However, the chlorophyll-a in chloroplasts actually defend the plant from harmful damage of the TREMENDOUS amount of power from the sun transmitted in green wavelengths.

SO CHLOROPHYLL-A PROTECTS PLANTS FROM TOO MUCH ENERGY IN GREEN LIGHT.

8 0
3 years ago
Which of the following statements is true? Sweating is an example of postive feedback. Shivering is an example of negative feedb
Alexandra [31]

Answer:

all of the above

Explanation:

All the statements are true that is Sweating is an example of positive feedback because when you sweat your body becomes hot and your inner body becomes cool.  Shivering is an example of negative feedback because shivering occurs when there is cold in the body and can lead to sickness. The nervous system is responsible for sensing changes in the environment because it is responsible for sensing what's going on in our body.

4 0
3 years ago
Read 2 more answers
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