Answer:
No 15N/15N labeled DNA was observed in second generation
Explanation:
Meselson and Stahl were doing an experiment to find out the semi-conservative mode of replication of DNA. The first cultured bacteria in 15N medium which was containing a heavy isotope of nitrogen. The DNA synthesized here had more density. After that they transferred the bacteria to the 14N containing medium. When bacteria reproduced and new strands of DNA were synthesized, they observed the following -
- The first generation had hybrid DNA with 15N/14N strands
- The second generation had both hybrid 15N/14N DNA and 14N/14N DNA strands
- There was no 15N/15N DNA observed.
In this way they proved that one strand of DNA is kept conserved during the replication.
Answer:
Yea.... That's why it's not the same temp every where
50% of the offspring will make constricted pods and 50% will be inflated. the probability of inflated pods are 50% out of 100
Cephalopods have a closed circulatory system where blood is transported through vessels. However, most other mollusks have an open circulatory system where blood is not always in vessels, but is spread over the organs.
<h2>The phylogenetic distribution of the enzyme RuBisCo is limited to all photoautotrophs, both bacterial and eukaryotic.
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Explanation:
- This is because the RuBisCo mechanism takes place in all photoautotrophs and fixes inorganic CO2 into organic biomass or the biosphere through the Calvin Cycle of photosynthesis.
- The D-Ribulose-1, 5-Biphosphate Carboxylase-Oxygenase or RuBisCo is a catalytic enzyme that plays a crucial part in photosynthesis through carbon fixation by photoautotrophs including bacteria and eukaryotes.
- The RuBisCo takes part in photosynthesis especially in Calvin Cycle during fixation of carbon from carbon dioxide to D-Ribulose.
- Since it is a photosynthetic enzyme, it is present in photoautotrophs
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