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Novay_Z [31]
3 years ago
11

Sergei Winogradsky Choose one: A. discovered microbial fermentation. B. developed a pure culturing system using agar. C. identif

ied microbes using biotechnology. D. discovered chemolithotrophs in natural environments.
Biology
2 answers:
NeX [460]3 years ago
7 0

Answer:

D. Discovered chemolithotrophs in natural enviroments.

Explanation:

Sergei Winogradsky was a russian microbiologist. He observed in his research with genus of bacteria <em>Beggiatoa, </em>they were able to oxidize hydrogen sulfide as an energy source. Being the first example known of lithotrophs (organisms that use inorganic substrate in order to obtain energy).

alex41 [277]3 years ago
5 0

Answer:

The correct answer is option D. "discovered chemolithotrophs in natural environments".

Explanation:

Sergei Nikolaievich Winogradsky was a ecological and soil scientist famous for being a pioneer for the definition of the concept of cycle of life. Winogradsky is also known for being the first scientist who discovered chemolithotrophs in natural environments. He made this achievement during his research with Beggiatoa in 1887, reporting that this organism was able to oxidize hydrogen sulfide as an energy source.

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2 years ago
In order for this code to represent a piece of DNA, which base must be replaced by thymine?
HACTEHA [7]
I guess you forgot to add the picture or so.
Based on the Complementarity of the 4 nucleotides, The thymine must always be placed in  front of the Adenine, and the Cytosine must always be placed in front of the Guanine.
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Hope this Helps! :)
7 0
3 years ago
A _____ is a measure of how much a typical serving size of a particular food raises blood glucose.​
kirill115 [55]
The correct answer is glycemic load.
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6 0
3 years ago
Read 2 more answers
Dog breeders have a purebred black male dog and a purebred white female dog of the same breed. When they bred these two dogs, al
sladkih [1.3K]
D. Dominant

It is dominant as...
The white coat alleles are recessive, meaning the black coat would most likely be dominant alleles. Assuming the black coated dog had the alleles of BB, and the white coated dog had the alleles ww, there would be a 100% chance that the offspring would have Bw alleles, where the black coat is dominant, "all the offspring were black". 
B = Black, W = White
      B    B
w   Bw  Bw
w   Bw  Bw
The diagram above shows that the offspring would be 100% black coated.

Not sure if you wanted an explanation, but I tried.
3 0
3 years ago
Within the human body, different cells have different characteristics or phenotypes. For example, neurons look and behave very d
romanna [79]

Answer:

different proteins

Explanation:

All the cells of the body are derived from same cell still different cells have different characteristics or phenotypes. For example, the hemoglobin is present in RBCs only not in any other cell. This is because of a process called gene expression.

This process regulates expression or repression of different set of genes. This makes embryonic cells to become specialized cells that is to perform a specific function. The gene contains DNA which gets transcribed to RNA and then to proteins. The different proteins provides different specificity to cell.

4 0
3 years ago
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