Biology, 19.11.2019 04:31 reggie1127
In a famous experiment, matthew meselson and franklin stahl grew e. coli cells in a medium containing only the "heavy" isotope of nitrogen, n15n15 . these cells were then transferred to a medium with the "light" isotope of nitrogen, n14n14 . the results of the experiment supported the hypothesis of semiconservative replication, which was proposed by watson and crick. heavy dna ( n15n15 dna), hybrid dna, and light dna ( n14n14 dna) can be separated by centrifugation. if cells containing n15n15 dna are transferred to a medium with only n14n14 nh4clnh4cl as a nitrogen source, what percent of daughter molecules are composed of hybrid dna after 44 generations?
Answers: 2
Biology, 22.06.2019 10:00
1. in a certain species of plant, the color purple (p) is dominant to the color white (p). according the punnett square, what is the probability of and offspring being white? 50%25%0%100% 2. in a certain species of plant, the color purple (p) is dominant to the color white (p). according the punnett square, what is the probability of and offspring being white? 0%100%50%25%(picture 1 is for question 1, and picture 2 is for question 2)
Answers: 1
Biology, 22.06.2019 12:50
Which of the following types of pollution is most responsible for large numbers of deaths worldwide because of unsafe drinking water? (a) nutrient pollution (b) thermal pollution (c) pathogen pollution (d) sediment pollution
Answers: 2
Biology, 22.06.2019 14:30
Find the mass of the cone using the triple beam balance. a. 543.0 g b. 542.0 g c. 504.28 g d. 502.8 g select the best answer from the choices provided a b c d
Answers: 3
Biology, 22.06.2019 16:50
What is a general feature of a species that varies from one individual to the next (skin tone,eye color or hair color)? a.organism b.trait c.character
Answers: 2
In a famous experiment, matthew meselson and franklin stahl grew e. coli cells in a medium containin...
Mathematics, 10.03.2021 18:20
Mathematics, 10.03.2021 18:20
Social Studies, 10.03.2021 18:20
Spanish, 10.03.2021 18:20
Biology, 10.03.2021 18:20
English, 10.03.2021 18:20
Mathematics, 10.03.2021 18:30
History, 10.03.2021 18:30
Advanced Placement (AP), 10.03.2021 18:30