Water is a small molecule that easily diffuses through a cell membrane despite the lipid tails. The diffusion of water is what we call “osmosis”. Oxygen is a small molecule and it is also nonpolar, so it easily passes through a cell membrane.
It is able to pass through because of the high osmotic pressure difference between the inside and outside of the cell.
Most of the water passes through channels called “aquaporins”.
After the temporary layer is released during the menstrual period the uterine lining is about 2mm thick. When estrogen levels increase the uterine lining regenerates 11mm thick by late in the follicular stage.
I hope this helps:)
Estivation is prolonged torpor or democracy of an animal during a hot or
dry period. Hibernation and estivation are similar in that they are
adaptations to harsh.
Answer:
the observations that chloroplasts and mitochondria resemble bacteria
Explanation:
The Endosymbiotic Theory is a theory that enables us to understand the origin of eukaryotic cells. The Endosymbiotic Theory posits that the mitochondria and chloroplast, which are organelles found in the eukaryotic cells, were once prokaryotic microbes that were first ingested by amoeba-like organisms and subsequently evolved by developing a symbiotic relationship with them. Some of the most important lines of evidence that supports this theory are: 1-chloroplasts and mitochondria resemble prokaryotic cells, i.e., they have a similar size, replicate by binary fission and there are unicellular eukaryotic protists that have filamentous temperature-sensitive proteins at their division plane (similarly to bacteria), and 2- chloroplasts and mitochondria are organelles with their own DNA and their own ribosomes (which are similar to those of bacteria).
The bear's usually travel alone, but will tolerate each other and travel in groups, you never see them in groups cause they are independent and can survive on their on, and mainly because they don't like sharing their food..:D
