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Art [367]
3 years ago
11

A. An example of a sign of a pathogen on a diseased plant is a. soft rot b. a canker on a plant stem c. stunted growth d. myceli

um of a pathogen on the plant surface.
Geography
1 answer:
denis23 [38]3 years ago
3 0

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 .

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  • Conduction: It happens when particles of matter are in direct contact, the adjacent atoms of higher energy vibrate against each other transferring energy from high to low temperature. Fluids and gases are less conductive than solids because their atoms have a greater distance. An example is the heat transferred between the electric burner of a stove and the bottom of a pan.
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Advection and radiation are the primary forms of heat transfer. Convection only happens in the troposphere because horizontal heat transfer (advection) is significantly bigger. The same happens with conduction that only transfers heat in the lower layers of the atmosphere, Sun's radiation, on the other hand, gets absorbed in all the atmosphere.

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