Answer: My best guess would be B but i might be wrong that sounds most right to me. :)
Explanation:
Answer: ATP (adenosine tri-phosphate) supplies energy for cellular activities when one of its phosphate bonds is broken.
The answer is 700 milligrams needed toddlers should consume
per day. Children need enough calcium to support their growing bones and teeth.
Calcium is one of the body's most essential minerals and also has other necessary
roles to play, including supporting a healthy nervous system and muscle
function.
<u>Answer:</u>
A theory would be entirely replaced if a new information is discovered that contradicts with the previous theory.
Explanation:
Theories are made after being properly investigated and by having a large amount of supporting data.
But theories can be subjected to entirely change and be replaced if a new theory comes up that contradicts with the previous theory. As science is an emerging field and new researches are conducted day by day so previous theories can be wrong. However, the new theory should have enough evidence and reasoning to prove that the previous theory was wrong.
Answer:
G1 phase: 2C
S phase: 4C
G2 phase: 4C
Meiosis-I: 2C and Meiosis-II: C
Mitosis: 2C
Explanation:
Let's suppose that a cell with 2C DNA content enters the cell cycle. As the G1 cell with 2C content would enter the S phase, DNA replication would double the amount of DNA. Therefore, the cell by the end of the S phase and in the G2 phase would have 4C DNA.
If the G2 cell with 4C DNA enters meiosis-I, separation of homologous chromosomes to the opposite poles in anaphase-I would reduce the DNA content to 2C. Therefore, the cell by the end of anaphase-I would have 2C content. Meiosis-II would further reduce the DNA content in anaphase-II by separation of sister chromatids to opposite poles. Therefore, each of the four daughter cells formed by the end of meiosis would have C DNA content.
If the G2 cell with 4C DNA enters mitosis, separation of sister chromatids to opposite poles in anaphase would reduce the DNA content. Therefore, each of the two daughter cells formed by the end of mitosis would have 2C DNA content.
