One function of gap junctions appears to be to cellular communication the activities of like cells in a particular area.
Connexins, membrane proteins that connect nearby cells, create tiny, fluid-filled tunnels known as connexons at gap junctions. Instead of being fused together like in tight junctions, the plasma membranes of gap junctions are separated by a very small intercellular gap (space).
Ions and tiny molecules can move from the cytosol of one cell to another through connexons. In avascular tissues like the cornea and lens of the eye, the transfer of nutrients and possibly wastes occurs through gap junctions.
Some of the chemical and electrical signals that control development and cell differentiation in a developing embryo travel through gap junctions.
To learn more about gap junctions click here
brainly.com/question/8293781
#SPJ4
Neither is correct actually
The fossil record is the type of evidence that is used with molecular clocks to estimate the split from a common ancestor.
<h3>What is a molecular clock?</h3>
A molecular clock is an estimation of the times of divergence used for the study of biological phenomena.
Molecular clocks are based on fossils found for a given species and the mutation rate of a given genomic sequence.
In conclusion, fossils are used as point of reference to build molecular clocks based on the mutation rate of homo-logous nucleotide sequences for a given taxonomic group for which these fossils belong.
Learn more about molecular clocks here:
brainly.com/question/2141539
#SPJ1
The solution surrounding the cell would be termed "hypotonic," in which the osmolarity, or concentration of small particles, is less that the osmolarity of the solution of reference (cytosol). This relative "lack of solids" outside as compared to inside, will lead to water diffusion to where there are more water molecules per solids, or less concentration of water. Osmosis is this driving force that occurs from the diffusion of water from a greater concentration of water (lesser solutes) to a lesser concentration of water (greater solutes). This phenomenon is crucial towards maintaining life and homeostasis within organisms.
Note: the term "osmolarity" refers to the concentration of solid dissolvable particles (solutes or osmolytes) as compared to the concentration of the solvent (water). Therefore it is similar to molarity, where the higher the osmolarity, then the more particles are present per volume of water; and likewise the lower the osmolarity, the more diluted a solution is. It's name comes from the very fact that differences in neighboring osmolarities contribute to osmosis, or the net movement of water.