Need help ASAP TY BOYS AND GIRLS What is the best definition of the word tumour? *

1)an abnormal clump of cells
2)a clump of cells that are about to die
3)a clump of cells that are producing toxins
4)cells that are dividing rapidly and can spread to other parts of the body

Sweating and breathing is an example of differentiation specialization maintaining homeostasis metabolism

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

How are proteins and nucleic acids related? they both provide energy. they both carry genetic information. the structure of proteins is determined by nucleic acids. the subunits of nucleic acids are also the subunits of proteins.