Answer:
hope this helps
Explanation:
About 95 percent of the time, Down syndrome is caused by trisomy 21 — the person has three copies of chromosome 21, instead of the usual two copies, in all cells. This is caused by abnormal cell division during the development of the sperm cell or the egg cell.
Answer:
Oxygen is needed to break the sugar into carbon dioxide, releasing energy the plants can use to stay alive. However, plants also take in energy from the sun(light), carbon dioxide from the atmosphere, and water from the soil; they use all of them in order to make sugar, and release oxygen.
Explanation:
Answer:
Water (H2O) can be called a molecule or a compound because it is made of hydrogen (H) and oxygen (O) atoms. There are two main types of chemical bonds that hold atoms together: covalent and ionic/electrovalent bonds. Atoms that share electrons in a chemical bond have covalent bonds.
The cellular process shown in the image as x, y and z are mentioned below:
X is Replication. It is the process by which double- DNA Replication is the process by which double stranded DNA makes its own copies. Each strand on its separation, synthesizes a complementary stand.
Y is Transcription. It is the process by which copying of the information from a strand of DNA into a new molecule of mRNA, with the help of an enzyme RNA polymerase.
Z is Translation. It is the process in which genetic code on mRNA is decoded to produce the specific sequence of amino acids to form a polypeptide chain.
Answer:
Explanation:
(in an echinoderm) each of a large number of small flexible hollow appendages protruding through the ambulacra, used either for locomotion or for collecting food and operated by hydraulic pressure within the water-vascular system.
