Answer:
A. They contain a single circular DNA molecule.
Explanation:
Messenger RNA (mRNA) molecules carry the coding sequences for protein synthesis and are called transcripts; ribosomal RNA (rRNA) molecules form the core of a cell's ribosomes (the structures in which protein synthesis takes place); and transfer RNA<span> (tRNA) molecules carry amino acids to the ribosomes during protein synthesis.</span>
Answer:
An adaptation is a physical change that has been made to survive/ live
In metaphase 1, tetrads of homologous pairs lined up along the center of the of the cell and attached to the spindle fibers. During this process, the bivalents or pairs of chromosomes are arranged on the metaphase plate and become attached to the fully formed meotic spindle. The centrioles are on the cell's opposite poles. Each bivalent are coiled tightly and condensed. Spindle fibers from each pole of the cell are attached to each homologous chromosome.