your answers are b., travel, & E., loosely packed soil
I think sister groups. Imagine them having the same parents.
Particles or molecules that are too big to fit through regular pores in the cell membrane, or have to big an electric charge, against the current of passive transport ( lower to higher ).
Cerebrospinal Fluid
Produced by the choroid plexuses of the brain, the cerebral spinal fluid is contained in the subarachnoid cavity and spinal canal. It is reabsorbed by the arachnoid granulations.
Besides acting as a cushion for the CNS, the cerebral spinal fluid plays a critical part in the immunology of the central nervous system, blood flow in the CNS and autoregulation.
Answer:
17. D) Hypothesis
18. Not accurate but it is precise
19. D) precision
20. A) quantitive observation
21. B) Control
22. Volume.
hope this helps!
