A newly hatched duck adopts the most frequently encountered animal or object it sees during a sensitive period as its mother. This is an example of
A) operant conditioning.
B) insight learning.
C) habituation.
D) trial-and-error learning.
E) imprinting.
E
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This unit explored features that describe living organisms. Choose all that apply to living organisms from the following.
Major nerve tracts are formed.
Choose the letter of the best match: A. third trimester of pregnancy B. second month of pregnancy C. first month of pregnancy D. second trimester of pregnancy E. third month of pregnancy
The driving force that pushes the root tip through the soil is primarily _____
A) continuous cell division in the root cap at the tip of the root B) continuous cell division just behind the root cap in the center of the apical meristem C) elongation of cells behind the root apical meristem D) continuous cell division of root cap cells
What is the difference between the endocrine system and the autonomic nervous system?
A. Norepinephrine is produced by the autonomic nervous system, while epinephrine is produced by the endocrine system. B. The axons of neurons of the endocrine system travel a shorter distance than those of the autonomic nervous system. C. The autonomic nervous system promotes "fight or flight" functions, while the endocrine system promotes "rest and digest" functions. D. The endocrine system employs chemical signals only, while the autonomic nervous system involves a combination of electrical and chemical signals.