It's called The mesentery!
Answer:
The digestive tract of cnidarians consists of only of an <u>orifice </u>and a <u>gastrovacular cavity
</u> (the coelenteron or <u>blind gut</u>)
Explanation:
Cnidarians are a group of simple organisms whose habitat is predominantly aquatic, such as sponges and jellyfish. They are diblastic organisms -as they are formed from two embryonic leaves, the ectoderm and gastroderm- and radial symmetry, with an incipient nervous system.
One of the main characteristics of Cnidarians is that they have a single orifice that communicates the exterior with the single cavity that forms the coelenteron, or gastrovascular cavity, which together form their digestive and excretory tracts. While in the cavity occur the processes of absorption of nutrients, distribution of them throughout the body and disposal of waste (vascular function), the single orifice acts as a mouth and anus.
Answer: It is called codominance
Explanation: Every trait is controlled by at least a pair of gene. Genes have different forms known as alleles. Codominance is a heterozygous condition in which two alleles at a gene locus are fully and equally expressed in the phenotype of the organism. The alleles that express themselves equally are called codominant alleles. Neither of the alleles is fully dominant over the other in codominance.
Example is in the ABO blood group in which A is dominant and B is also dominant and AB is codominant while O is recessive.
Answer:
What is the difference between osmosis and diffusion? Osmosis is the movement of water molecules through the cell. Diffusion is the movement of molecules, such as oxygen, in and out of a cell. The process by which water molecules are able to diffuse through the cell membrane.
Explanation:
Acids and bases determine pH. Acids have pH 0 -7 while bases have pH 7 -14. Enzymes function within a very narrow optimum range of pH.
Different enzymes have different optimum pH values. This is the pH value at which the bonds within them are influenced by H+ and OH- ions in such a way that the shape of their active site is most complementary to the shape of their substrate.
Extreme changes in pH above or below the optimum as caused by strong bases and acids can cause the weak linkages e.g. hydrogen bonds in the enzyme's protein molecules to break permanently resulting in denaturation of the protein and impairing its functions because the enzyme can no longer conform its active site to complement that of its substrate and therefore no reaction can take place.