A FARMER WHO WANTS TO KEEP SEEDS FOR THREE YEARS BEFORE PLANTING AND WANTS TO PREVENT THEM FROM SPROUTING USES
A. auxin B. gibberellins C. abscisin ✓ D. cytokinins The answer to the question is: C. abscisin The farmer who wants to keep seeds for three years before planting and prevent them from sprouting would use abscisic acid (ABA). ABA is a plant hormone…
A RADIOACTIVE NUCLEUS HAS A HALF-LIFE OF 20 YEARS, STARTING WITH 100,000 PARTICLES, HOW MANY PARTICLES WILL BE LEFT EXACTLY AT THE END OF 40 YEARS
A. 75,000 particles B. 35,000 particles C. 25,000 particles ✓ D. 50,000 particles The answer to the question is: C. 25,000 particles The decay of a radioactive nucleus can be described by its half-life, which is the time it takes for half…