Answer:
b. a canker on a plant stem
Explanation:
A canker on a plant stem -
It is the clear and strong evidence of a plant suffering from a disease which is due to pathogens.
According to the question , other options , stunted growth and soft rot, are not caused because of pathogens , they are due to genetic reasons .
And, the option, mycelium of a pathogen , is not a plant disease .
Hence , incorrect option .
Therefore , from the options , the correct one is - a canker on a plant stem .
Answer:
Experts believe the significant number of fish washing up on local shores can be attributed to higher than normal temperatures. Water gets warmer and it holds less oxygen so there is less for the fish to breathe.
Are surfaces that represent gaps in the geologic record that formed whenever layers were not deposited for a time or else layers were removed by erosion