The correct answer is letter D. He has trouble with his balance. This is part of the inner ear that is contains a semi-like fluid inside that is sensitive to movements and motions of the body. Inside these semi-circular canals are hair-like structures that sway or move with the fluids when it detects motion. If there is an imbalance within the membrane, a person may have problems with his balance. A condition that is also known as vertigo.
It is False that the peripheral nervous system includes the brain and the spinal cord. It is actually the central nervous system that includes the brain and the spinal cord. The answer is false.
Answer:
Cellulose
Explanation:
Cell walls made of cellulose are only found around plant cells and a few other organisms. Cellulose is a specialized sugar that is classified as a structural carbohydrate and not used for energy. ... While cell walls protect the cells, they also allow plants to grow to great heights. You have a skeleton to hold you up.
DNA carries the information for making all of the cell's proteins.
These proteins implement all of the functions of a living organism and
determine the organism's characteristics. When the cell reproduces, it
has to pass all of this information on to the daughter cells.<span>Before a cell can reproduce, it must first replicate,
or make a copy of, its DNA. Where DNA replication occurs depends upon
whether the cells is a prokaryote or a eukaryote (see the RNA sidebar on
the previous page for more about the types of cells). DNA replication
occurs in the cytoplasm of prokaryotes and in the nucleus of eukaryotes.
Regardless of where DNA replication occurs, the basic process is the
same.</span><span>The structure of DNA lends itself easily to DNA replication. Each side of the double helix runs in opposite (anti-parallel)
directions. The beauty of this structure is that it can unzip down the
middle and each side can serve as a pattern or template for the other
side (called semi-conservative replication). However, DNA does not unzip entirely. It unzips in a small area called a replication fork, which then moves down the entire length of the molecule.</span>Let's look at the details:An enzyme called DNA gyrase makes a nick in the double helix and each side separatesAn enzyme called helicase unwinds the double-stranded DNASeveral small proteins called single strand binding proteins (SSB) temporarily bind to each side and keep them separatedAn enzyme complex called DNA polymerase
"walks" down the DNA strands and adds new nucleotides to each strand.
The nucleotides pair with the complementary nucleotides on the existing
stand (A with T, G with C).A subunit of the DNA polymerase proofreads the new DNAAn enzyme called DNA ligase seals up the fragments into one long continuous strandThe new copies automatically wind up again