They are accepted as true until they are proven false. Once a theory has been tested and it is wrong, then it is no longer true.
D. Most organisms have teeth
1 mile.
Since he walks at a speed of 2 miles per hour, he will have only walked 1 mile after walking for half of an hour.
In cell division, the S-phase is characterized by the duplication of chromosomes. The correct option is B.
<h3>What is S-phase?</h3>
Cell division is the division of parent cells into two daughter cells under favorable conditions.
S-phase is the synthetic phase that is responsible for the duplication of the genome along with the accumulation of essential nutrients required by cells for division.
In cell division, the S-phase is characterized by the duplication of chromosomes.
Thus, the correct option is B.
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Answer:
Grass is the primary producer in ecological system
