HOMEOSTASIS The cells can survive, if the temperature, pressure and chemical composition of their fluid environment remains constant. The surrounding environment of the body provides oxygen and nutrients required by all cells of the body.anation:
<span>Chest
compression can save the lives of patient in cardiac arrest as it generate a
small but critical amount of blood flow to the heart and brain. It provides
oxygen quickly to the brain, heart, lungs and other organs until normal
function of the heart and lung restored. When the patient is unresponsive without
definite pulse or normal breathing then the responder should assume that the
patient is in cardiac arrest. CPR or chest compression is used to keep oxygen
circulating around the body until a defibrillator can be used or until the
ambulance arrives. Moreover, defibrillator is a device used to help blood flow
in order to help the patient survive or recover from cardiac arrest. This
procedure can momentarily stops the heart and the chaotic rhythm and often
allows the normal heart rhythm to resume. However, chest compression be given
when the patient has no pulse while CPR is performed when the patient is
unresponsive, not breathing and has no pulse.</span>
<h3><u>Answer and Explanation;</u></h3>
- <u>Endosymbiotic theory</u> explains the origin of chloroplasts and mitochondria and their double membrane. Mitochondria of eukaryotes evolved from aerobic bacteria living within their host cell and the chloroplasts of eukaryotes evolved from endosymbiotic cyanobacteria.
- On the other hand according to the <u>autogenous hypothesis, </u>mitochondria and chloroplasts have evolved within the protoeukaryote cell by compartmentalizing plasmids or vesicles of DNA within a pinched off invagination of the cell membrane.
- <u>Endosymbiont theory </u>is the theory that suggests that simple prokaryotic cells were engulfed by larger prokaryotes 1.5 billion years ago.
- <u>Autogenous theory</u> is a theory that was proposed as an alternative to endosymbiont theory. proposes that eukaryotic organelles formed by infolding of the plasma membrane.
- <u>Horizontal gene transfer theory</u> is an alternative to endosymbiont and autogenous theories for the origin of complex organelles in eukaryotes.
Answer:
which cycle please.....I don't understand
