It is believed that solar nebular materials came from which of the following?
a. material from previous stars
b. the sun
c. terrestrial planets
d. solar winds

What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell? a. passive transport b.diffusion c. endocytosis d. exocytosisc. endocytosis

Match the correct terms to their descriptions a system in which only energy but not matter is exchanged frozen water in snow part of geosphere that includes only soil a thin layer between the troposphere and the stratosphere cryosphere tropopause closed system pedosphere

Involving transcription and translaton. explain the causes and effects of damage to the genetic code.