Answer:
Option B is likely originated from photosynthetic bacteria.
Explanation:
A) pellicle and contractile vacoule
B) Stigma and chloroplast (photosynthetic bacteria)
C) reservoir and flagellum
D) photoreceptor and Nucleolus
Euglena is a genus of single cell flagellate eukaryotes. Euglena have features of both animals and plants. Euglena have photosynthesizing chloroplasts within the body of the cell, which enable them to feed by autotrophy, like plants. Euglena's chloroplasts evolved from a eukaryotic green alga. Thus, the intriguing similarities between Euglena and the plants have arisen of a secondary endosymbiosis. Molecular phylogenetic analysis support this hypothesis but this is not generally accepted. A stigma (red eyespot) is located near the base of the reservoir and this filters the light and focuses it on the paraflagellar body, and is involved in the phototaxis of this alga.
Many different codons specify the same amino acid.
ion-dipole is the type of interaction which best describes the attraction between mg2+ ions and water molecules.
The intermolecular force of attraction between a charge ion (cation or anion) and a molecule is known as an ion-dipole interaction. It is frequently found in solutions where ionic compounds dissolve in polar solvents. When an ion interacts with a non-polar molecule, an ion-induced dipole force is produced. The charge of the ion, like a dipole-induced dipole force, causes a distortion of the electron cloud in the non-polar molecule, resulting in a temporary partial charge. Magnesium ion interacts with an ion dipole via water.
Learn more about ion-dipole interaction here:
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the complete question is :
Select the type of interaction which best describes the attraction between Mg2+ ions and water molecules.
A) dipole-dipole
B) dipole-induced dipole
C) ion-dipole
D) ion-induced dipole
E) ion-hydrogen bond