Radiation is known to kill cells by damaging dna; how can radiation be controlled and safely used in medicine?

There are different types of radiation. Some harm us, some aid us, and some don't do anything to us at all. What radiation actually does in mutate the DNA. If you are the one applying the radiation you can control the mutation to be things that help the body.

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation

a

explanation:

many plants naturally reproduce this way, but it can also be induced artificially. horticulturalists have developed asexual propagation techniques that use vegetative plant parts to replicate plants. success rates and difficulty of propagation vary greatly. monocotyledons typically lack a vascular cambium and therefore are harder to propagate.