The absolute threshold is the:
a. decreasing sensitivity to a stimulus over time.
b. intensity of a stimulus that can be detected in the presence of noise.
c. minimal intensity needed to just barely detect a stimulus.
d. minimal change in a stimulus that can just barely be detected.

When does the circulatory system work with the respiratory system? a. during blood cell formation b. during cellular respiration c. during intestinal digestion d. during a viral infection

Svetlana and her mother are very similar. both have blonde hair, a love of scrapbooking, blue eyes, and a thin nose. which statement  most likely  describes svetlana’s traits? svetlana inherited her love of scrapbooking from her mother, but her blue eyes come from her environment.svetlana inherited her blue eyes from her mother, but her love of scrapbooking comes from her environment.svetlana inherited her thin nose from her mother, but her blonde hair comes from her environment.svetlana inherited her blonde hair from her mother, but her thin nose comes from her environment.

How does human environment effect the biosphere