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Olin [163]
3 years ago
14

Which is an external stimulus? A. Thirst B. Hunger C. Pain D. Heat

Biology
2 answers:
Vlada [557]3 years ago
8 0
D. Heat, heat is an external stimulus. An external stimulus is a signal that originates from outside an organism.
Liula [17]3 years ago
3 0
C.Pain is the answer.
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Describe the<br> relationship<br> between the age<br> of rock layers and<br> an unconformity
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Answer:

Laws of stratigraphy help scientists determine the relative ages of rocks. This law states that deeper rock layers are older than layers closer to the surface. An unconformity is a gap in rock layers. They occur where older rock layers eroded completely before new rock layers were deposited.

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7 0
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What is the correct order of events: Homologous chromosome separate Chromosome condenses Lining up on metaphase plate, Crossing
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