Both plant and animal cells have membranes so whatever chemical reactions they have going inside the cell, it is regulated and maintained. Membranes help separate the internal environment from the external environment.
Hope this helps - I'm currently in cell biology so this question is interesting
Answer:
C. Age of Mammals
Explanation:
Cenozoic is derived from Greek word meaning NEW LIFE. The Cenozoic Era witnessed the disappearance of Dinosaurs which made Mammals to thrive and giving a new life to mammals. During this early stage as new life is beginning, majority of the animal species are relatively small comprising of the small mammals, birds, reptiles and amphibians.
The narrator reacted to the dreaded sentence of death handed down to him BY BLACKING OUT.
The Pit and the Pendulum is a short story written by Edgar Allan Poe. The story is about a prisoner, who endured much torment. The story opens with the trial of the narrator of the story. The narrator was been tried by a panel of judges. At the end of the trial, the narrator was sentence to death and this makes him to black out.
Every man for themselves, only the strongest will survive through whatever environment they may be put in.
Endocrine signaling is hormone based signaling that travels through the blood stream. Many of the sensors and integrating sensors of the endocrine system are located in the brain. The brain barrier contributes to endocrine signalling, such that the brain barrier does not factor in with endocrine signalling. The answer is A