This is false the most classified animal groups are mammals and birds. The third most classified animal group is the fish.
I hope this helps! If your confused just let me know!
Nucleotides. DNA and RNA are polymers (in the case of DNA, often very long polymers), and are made up of monomers known as nucleotides. ... Each nucleotide is made up of three parts: a nitrogen-containing ring structure called a nitrogenous base, a five-carbon sugar, and at least one phosphate group.(Hoped this helped)
<span>I believe the correct words to fill in the blanks are RNA and nuclear pores. RNA, not dna can leave the nucleus through the nuclear pores in the nuclear envelope. Hope this answers the question. Have a nice day. Feel free to ask more questions. Have a nice day.</span>
B I could be wrong though
Answer
The nervous and skeletomuscular systems help maintain homostasis by regulating respiration.
Explanation:
The brain stem, consisting of the pons and medulla, represent the main respiratory center. According to Wikipedia, "an increased level of carbon dioxide in the blood, or a decreased level of oxygen, will result in a deeper breathing pattern and increased respiratory rate to bring the blood gases back to equilibrium."
This is an example of a homostastic response controlled by both of the organ systems referenced above.
Source: https://en.wikipedia.org/wiki/Homeostasis