The answer is Protista.
The dichotomous key is used to identify the taxonomic category of an organism. So, if we start with statements from the beginning, and discard the possibilities, we can put the organism into some taxonomic group.
Accordingly, we know that a stentor has a nucleus, so it must be eukaryotic. Among the Eukaryotes, it could belong to the kingdom of Protista, Fungi, Plantae and Animalia. Since it is unicellular organism and lives only in the water, it could belong only to the kingdom of Protista
The best tools to measure the density of a small piece of silver ore is to use a graduated cylinder and a balance.
Answer:
Hypertonic
Explanation:
Soda is an example of an hypertonic solution. It is hypertonic in the sense that to make it work for the body, there needs to be a certain amount of water that would be taken from the body for it to be diluted.
The term hypertonic means it is at an elevated concentration than what we have in the regular body.
So to bring it to work, water from the body needs to dilute it. Hence, by bringing water to dilute it, more water is taken from the already thirsty system and thus, the overall effect is that the person that takes the hypertonic solution is left to be more thirstier
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.