Who developed protein crystallography and discovered the structure of vitamin b12?

1 answer:

6 0

Dorothy Mary Crowfoot Hodgkin was the first to develop protein crystallography and she won Nobel Prize for that discovery ( third woman to win the Nobel Prize in Chemistry). Hodgkin confirmed the structure of penicillin but also realized the structure of vitamin B12 by x-ray crystallography analysis. She advanced the classical technique of X-ray crystallography.

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If a sudden increase in parasites in an area attacked a certain population of bear, how would that affect the growth of the bear

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The bear population would become smaller in that area, especially since some parasites can have a big effect on appetite, behavior, and other things. The bears wouldn’t populate as fast, and it may become almost stagnant as a result. hope that helps!

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A star is said to be born when _____.

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Answer:800 light years

Explanation:

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How do scientist predict the patterns of heredity?

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Answer:

The classic tool to predict the patterns of heredity is using a Punnett Square.

Explanation:

In genetics, a trait can be considered dominant or recessive. Since the important discoveries of Gregor Mendel, scientists use a capital letter (D) to indicate a trait is dominant, and a lowcase letter (d) to show a trait is recessive.

Assuming that a scientist knows the genotype for the desired trait they want to predict on the offpsring, a Punnett Square is a reliable tool and a graphic representation that permits them to visualize the potential features of the offspring by showing how the alleles may be exhibited and passed on the offspring and will determine the possible combination of genotypes.

How does it work?

For example, as we can observe in the image below, both parents are homozygous for a trait PP=Purple; pp=white. P is dominant and p is recessive (the color purple will be dominant, and the white will be recessive). So, we put one parent's genotype in the top row (PP) and the other parent's genotype in the left column (pp) and combine one of each letters on the squares, i.e. one of each parent's alleles. Then, we can observe in the results that 3 of the offspring will exhibit the purple color (PP, Pp, Pp) and only one will exhibit the white recessive color (pp); or more properly known as a genotypic ratio of 3:1.

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In an experiment, Marlene removes the six anthers from the flower. What best describes the ability of the altered flower to form

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In flowering plants, the male reproductive part or stamen is made up of a stack-like structure, known as filament and an ovule-like structure, known as anther. In anthers, microsporangia are present that produce pollen through mitosis.

Thus, 'if anthers are removed from a flower, it will not be able to form seeds as seeds are developed from zygote, that forms by the fusion of male gamete (pollen) and female gamete (ovum).'

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What evidence do we have that DNA exists?

makvit [3.9K]

Dna exists in the cells of all living organisms and dna proves evolution

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