Answer:
Explanation:
Thallophyta is a division of the plant kingdom including primitive forms of plant life showing a simple plant body. They were a defunct division of Kingdom Plantae that included fungus, lichens and algae and occasionally bryophytes, bacteria and the Myxomycota.
The source of variations is mutation.
Option (a);
<u>EXPLANATION: </u>
Mutation can create a completely different allele of species and this means that the new version of genes will be created with the mutation. Genetic variation refers to the difference in genes within a population.
An organism's DNA decides how that particular species looks or behaves. With the help of mutation, DNA of that organism is affected, thereby creating a different species altogether.
It is an important source of evolution as it affects the way that the body develops or works.
Answer:
shoot grows upwards and root downwards
