B.
The main organs of the excretory system are the intestines.
Answer:
O Provide first aid at an athletic event.
Explanation:
Answer:
B. nociceptors
Explination
Nociceptor or "pain receptor" is a sensory neuron that responds to damaging or potentially damaging stimuli by sending “possible threat” signals to the spinal cord and the brain.
Answer:
You didn't list any options? But, Getting proper sleep is very important, especially for kids. Not only does getting enough sleep help you grow better, but it also can help with a ton of other things such as your mood, work ethic, and much more. Overall, sleep is a pretty big factor on our activity performance, and that's why it is so important to get a good night's sleep.
Answer:
The Deoxyribonucleic Acid (DNA) is a molecule that contains the genetic instructions for the development, growth, and reproduction of all living things and many viruses. The DNA molecule is composed of two strands whose building blocks are named nucleotides. Each nucleotide consists of a sugar (deoxyribose), a phosphate group, and one of four bases: Guanine (G), and Thymine (T), Adenine (A) and Cytosine (C). These two strands wind around each other like a double helix by the pairing of complementary strands, where A always pairs with T, and C always pairs with G. The chromosomes are higher-order structures where the DNA molecule is packaged with histone proteins. In eukaryotic cells, the chromosomes are localized in the nucleus and mitochondria organelles, while in prokaryotic cells lack a nucleus and other organelles and thereby the genetic material is organized into a single chromosome found in an area of the cell cytoplasm named the nucleoid.
