Answer:the cell membrane provides protection for a cell
Explanation: that some molecules can diffuse across the lipid bilayer but others no
Rapid defibrillation is important because it contributes greatly to the survival of sudden cardiac arrest patients by eliminating abnormal hearth rhythm. Research has shown that the only proven, effective treatment for sudden heart attack is prompt defibrillation which is applied within the first few minutes of attack.
Answer: c. Gizzard
Explanation:
The Gizzard or ventriculus is the part of the digestive system of the aves, which acts as a mechanical stomach. It is composed of two sets of muscles that act as a avian teeth. It also posses the thick lining that protects those muscles. The gizzard facilitates the mechanical break down of the food as may be caused by the teeth.
Guard cells are located in the leaf epidermis and pairs of guard cells surround and form stomatal pores, which regulate CO2 influx from the atmosphere into the leaves for photosynthetic carbon fixation.
Stomatal guard cells also regulate water loss of plants via transpiration to the atmosphere.
