The answer is A. I'm sure about this
Many cacti have roots that spread out widely, but only penetrate a short distance into the soil. In one case, a young saguaro only 12 cm (4.7 in) tall had a root system with a diameter of 2 m (7 ft), but no more than 10 cm (4 in) deep.
In other words they can't penetrate that deep.
The answer is S phase.
If drugs prevent DNA replication which occurs in the S phase. That means that the S phase will be affected by these drugs.
B, d they have 23 chromosomes
