Question

Differentiate between Isogonic line and agonic line.​

Answer 1

Answer:

Isogonic lines are lines on the Earth's surface along which the declination has the same constant value, and lines along which the declination is zero are called agonic lines.

Answer 2

Answer:

Hence isogenic line is a line over the surface of the earth and agonic lines is an isogenic line upon which the declination is zero.

Explanation:

ISOGENIC LINES-

• Isogenic lines are defined as individuals that possess the same genotype irrespective of their homo or heterozygous nature.

• In classical plant breeding this means that vegetatively propagated clones are isogenic and lines of inbreeders become isogenic after repeated self- fertilization.

AGONIC LINES-

• The agonic is a line on global map along which the directions to true north and local magnetic north coincide.
• In other words it is where magnetic declination, sometimes simply referred to as magnetic variation, is zero.

Hence isogenic line is a line over the surface of the earth and agonic lines is an isogenic line upon which the declination is zero.