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Working from deep geologic strata toward shallow geologic strata, what is the sequence in which fossils of these groups should make their first appearance?
1) charophytes
2) single-celled green algae
3) hornworts
4) plants with a dominant sporophyte
Unconditioned Stimulus
A stimulus that naturally triggers a reflexive response without any prior learning.
Salivation
The secretion of saliva, often triggered reflexively by the anticipation or presence of food as a part of the digestive process.
Blood Sugar
The concentration of glucose in the blood, crucial for energy provision in the body.
Wagner's SOP Model
A theoretical model in psychology that explains how stimuli are processed into memories, focusing on the processes of acquisition, storage, and retrieval.
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