In one species of newts (amphibian vertebrates), called the rough-skinned newts, the level of toxins in the skin is extremely high and must be accompanied by a high fitness cost for these animals. Biologists found that the possible explanation for this was a predator, a species of snake that feeds on these newts, yet it was found to be resistant to this toxin. What is this an example of

in 1972 the fluid—mosaic membrane model of membrane structure was proposed based on thermodynamic principals of organization of membrane lipids and proteins and available evidence of asymmetry and lateral mobility within the membrane matrix [s. j. singer and g. l. nicolson, science 175 (1972) 720–731].

i don’t no. suiopgohjk

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.

you click your profile picture in the top right corner and it says edit profile.