A particular organism has the following characteristics: • It is single-celled.
•It does not have a nucleus or membrane-bound organelles.
•It is autotrophic, meaning that it makes its own food.
•It is able to replicate without a host cell.
Which of the following types of organisms is the type described above?

Prokaryotic cells

Explanation:

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.