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eduard
2 years ago
12

In living organisms, complex chemical activities do what to substances?

Biology
2 answers:
Firlakuza [10]2 years ago
8 0

Answer:

D. build them up and breaks them down

hope this will help :)

Gala2k [10]2 years ago
6 0

Answer:

D.Build them up and break them down.

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Which of the following investigators was (were) responsible for the following discovery? In DNA from any species, the amount of
Zarrin [17]

Answer :Erwin Chargaff   a Biochemist

Explanation:

He formulated the base paring of double helix of DNA. He reasoned that since the percentage of four  DNA  bases are of this proportions in human;

                                  Adenine=30.9% and Thymine =29.4%;

                                  Guanine=19.9% and Cytosine =19.8%

Then,  the amount of adenine will always be equal to thymine,

And the amount of Guanine equals to cytosine based on this percentages of distribution.  

(Adenine and Guanine are large, molecule of Purines, while thymine and Cytosine are Pyrimidine)  

 

He concluded (although scientist believed, he did not explicitly stated this) that this should be the base paring patterns in DNA molecule. This is the first Chargaff Rule.

His second rule is that the DNA composition, in the relative amount of the four bases Adenine, Thymine, Cytosine and Guanine varies in proportion from one organisms to another. And this is the basis of molecular diversity.

6 0
3 years ago
In recent decades rainforests throughout the world have been cut down for various reasons. In some cases the wood has been used;
hammer [34]
C hope it's right ur welcome
7 0
3 years ago
Where in water biomes can photosynthesis occur?
Naily [24]
Near the surface or the shallow water. Hope I helped
7 0
2 years ago
PLEASE HELP<br> ME PLEASE
nikitadnepr [17]
Whales are closely related to hoofed mammals with an even number of toes, such as horse, because they evolved from them. Before whales were what we know them as today, they were relatively similar to horses. They used the water to flee from predators, and they evolved slowly to heighten their swimming ability, eventually becoming modern day whales. Fish have always been aquatic animals that have gills. Whales cannot breathe underwater, so they take in oxygen the same way a horse does. Also, both horses and whales are mammals that give birth to their offspring and are warm-blooded. Fish lay eggs and are cold-blooded.

Hope this helped! Please give brainliest! :)
5 0
3 years ago
When all the values in a data set are written in order from least to greatest, the value that is in the middle, with an equal nu
Ierofanga [76]
I believe the answer you are looking for is median.

example:
2     4     6     |8|     10     12     14

median: 8
three on each side of "8"
5 0
3 years ago
Read 2 more answers
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