All mammalian has a bone structure that consists of a skull with a brain inside and a spine with a spinal cord inside.
All mammalians have three little bones into the middle ear to transmit sound.
All mammals have a dentary joint that joins the skull with the lower jaw and most of them have have heterodont teeth.
Usually it is 25% for energy pyramids
The correct answer is dipole-dipole interactions.
Dipole-dipole forces refer to the forces of attraction among the positive terminal of one polar molecule and the negative terminal of another polar molecule. For example, the bond between hydrogen and chlorine has a dipole-dipole attraction.
A dipole-dipole association refers to the association between the two polar constituents. When they move towards each other, the negative end molecule attracts the positive end of the other molecule.
Trypan blue staining can be used to discriminate between viable and dead cells and determine the number of viable cells present in a cell suspension.
https://www.creative-bioarray.com/support/trypan-blue-staining-assay.htm
