When a parent herring gull arrives at the nest with food, a chick will orient to and peck at the red spot on the parent's bill. The parent will then regurgitate the food into the chick's open mouth and the chick swallows it. What is this set of behaviors an example of?
A. innate releasing mechanism
B. sign stimulus
C. taxis
D. stimulus-response chain
E. fixed action pattern
Answer: D
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Environmental factors that might cause or contribute to schizophrenia include
A) infection by smallpox virus. B) maternal malnutrition. C) excess oxygen to a fetus. D) maternal use of anti-depressants.
A first aid for stingray injury is:
a. place the injured area in cold water or apply ice packs. b. pour ammonia over the injured area. c. place the injured area in hot water. d. apply MSG to the injured area. e. urinate onto the wound.
These land plants are the only ones to make true flowers and fruits
a. bryophytes b. seedless vascular plants c. gymnosperms d. angiosperms e. gymnosperms and angiosperms
Sister chromatid exchanges increase in frequency in the presence of X-rays, certain viruses, ultraviolet light, and certain chemical mutagens. In what autosomal recessive disorder is there known to be an increase in sister chromatid exchanges?
A) Harlequin syndrome B) cystic fibrosis C) achondroplasia D) Bloom syndrome E) Huntington's disease