Answer:
The intermediate density band is observed.
Explanation:
Messelson and Sthal's explained the model of semi conservative nature of DNA replication. According to this model, the newly synthesized DNA molecule contains one newly synthesized strand and one parental strand.
Firstly, bacteria grown in 15N media is transferred to 14N media. The isolated DNA is centrifuged and intermediate density DNA band is observed that contains one strand of 15N (parental strand) and one strand of 14N (newly synthesized strand).
Answer:
vitamin A is essential because consuming too much supplemental vitamin A during pregnancy can cause birth defects.
Hope this helps!
Answer: DNA and RNA
Explanation:
because we contain dna and rna.
Answer:
By consuming plants and animals.
Explanation:
Since plants are autotrophs, they absorb the sun's energy through photosynthesis and make glucose. herbivores (plant eating heterotrophs) then consume these plants and gain energy from the glucose and further up the food chain carnivores consume herbivores and also gain a bit of glucose from them.