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Explanation:
1)The cell membrane functions as a semi-permeable barrier, allowing a very few molecules across it while fencing the majority of organically produced chemicals inside the cell. Electron microscopic examinations of cell membranes have led to the development of the lipid bilayer model (also referred to as the fluid-mosaic model). The most common molecule in the model is the phospholipid, which has a polar (hydrophilic) head and two nonpolar (hydrophobic) tails.
2) simple diffusion across the cell plasma membrane. The structure of the lipid bilayer allows small, uncharged substances such as oxygen and carbon dioxide, and hydrophobic molecules such as lipids, to pass through the cell membrane, down the concentration gradient is , by simple diffusion.
3) some molecules, such as carbon dioxide and oxygen, can diffuse across the plasma membrane directly, but others need help to cross its hydrophobic or however, because they are charged the polar, they can't cross the phospholipid part of the membrane without help .
4) during fission a copy of the DNA is made and attached to the cell membrane as well. As this cell elongate in preparation for fission, the two DNA copies are pulled apart two opposite ends of the cell. New membrane material is deposited between the two ends of the cell, and a new wall grows between them .
5) UMASS STEM-ED From Bubbles to Cell Membranes Workshop. Bubble ... dynamic nature which can't be properly appreciated in a static textbook. ... the small thread through one of the straws.
6) example of passive transport and active transport across a cell membrane so, cell membranes are semipermeable meaning they have control over what molecules can or cannot pass through. Some molecules can just drift Inn.
1 tropical rain forest
2 tropical dry forest
3 desert
thats all i know :)
Well, an animal cell e/o a cytoplasm would miss a vital tool. The cell wouldn't have a certain,specific shape since the cytoplasm gives a cell it's shape. Also, the cell would have a very difficult time if any to break down waste, since that is one of the jobs of the cytoplasm. In addition, the cell would no longer have an aid in metabolic activity. Furthermore, without the cytoplasm the cell would be flat and substances would not be able to pass easily from one organelle to another. The organelles would not be held in a specific place w/o the cytoplasm. #Giveathanks.
Answer:
1.a ,Organism
18. Biosphere
19.b,ecosystem
31.a,Has a high heat capacity and therefore helps maintain a constant body temperature
46.c,repair tissue
49.d,all of the above
7.d,All atoms of an element contain the same number of protons