A. Earth's magnetic field reverses over time; the changes show that seafloor spreading has taken place over time.
Explanation:
The pattern of the magnetic minerals in seafloor ridges are aligned in a repeating pattern because the earth's magnetic field reverses overtime.
This provides evidence because the changes shows that the sea floor spreading has taken place over time.
- The concept of sea floor spreading was first suggested by Harry Hess in the early 1960's.
- Using sophisticated tools, he was able to discover stripe patterns of magnetic minerals in rocks.
- The earth can be likened to a giant bar magnet
- The geomagnetic field originates from the core where the movement of molten metals induces magnetism.
- In a fresh cooling magma, the metallic minerals are able to align their domains with the prevailing magnetic field.
- At some point the magnetic field is normal with a very strong intensity. At other times the intensity is low and it reverses.
- The minerals keeps track of the changes.
- This leads to striped pattern that has been used to suggest sea floor spreading.
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Answer:
The correct answer is option D. Permissive.
Explanation:
The permissive effect or interaction of a hormone is in which hormone can not show or exert its complete effect without the presence of another hormone on a specific target site or cell.
The interaction of a hormone can occur in two more ways - synergies and antagonism where synergy occurs when two hormones perform the same action on a target cell and impact are amplified, and antagonist has the opposite role in the presence of another hormone.
Thus, the correct answer is - d. Permissive.
The correct answer for the question that is being presented above is this one: "<span>Urochordata." </span>Lancelets have all chordate characteristics and segmentation in the adult. Tunicates (Sea Squirts), Subphylum: Urochordata Gill slits are the only chordate feature retained by the adult form.
Answer:
Deoxyribose, found in DNA, is a modified sugar, lacking one oxygen atom (hence the name "deoxy"). This difference of one oxygen atom is important for the enzymes that recognize DNA and RNA, because it allows these two molecules to be easily distinguished inside organisms.
Explanation:
