The rod cells in the retina contain a light-absorbing pigment called

a. melanin.

b. melatonin

c. iodopsin.

d. rhodopsin

Which is a physical characteristic of a fish? feathers fur fins wings

Does anyone know any psychology about life or school

A life cycle is best described as the ... -series of changes in the development of an organism -movement of an organism from place to place -ability of an organism to adapt to its environment -flow of energy through the organism in the environment

Long chains of amino acids are found in?

The tendinous cords of the tricuspid valve are tightened or relaxed when the right ventricle contracts?

What is the main difference between a cell nucleus and a nucleoid? A. size of the organelle. B. arrangement of the cytoskeleton C. movement of the flagella D. presence or absence of a surrounding membrane

What is the name of the moon phase

What is the age of viability, and during what weeks does a fetus reach this age?

Who was evolution established by

A student is applying the scientific method to a study of the effect of temperature on plant growth. Each day he writes down the temperature in plant height measurements and a table in his laboratory notebook.