Which of the following is an example of a behavioral mechanism used by an ectotherm when the ambient temperature drops?
-basking on black rocks
-developing dark or black coloration to increase heat absorption
-reducing heart rate during cold periods
-hiding under foliage

basking on black rocks.

Explanation:

In ectotherms, your body temperature depends primarily on external heat sources. The temperature of the ectotherms increases or decreases in conjunction with the temperature of their environment. Despite the fact that ectotherms produce some metabolic heat, they cannot increase their heat to maintain a specific internal temperature.

On the other hand, ectotherms regulate their body temperature, but seek sun, shade, etc. to search for environments whose temperatures compensate your needs.

integrated circuit (ic) is defined as a set of electronic circuits on one small flat piece of semiconductor material, normally silicon. a functional electronic circuit requires transistors, resistors, capacitors, inductors, etc., and the connections between them.

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.