<span>Men can produce sperm throughout their adulthood because their reproductive organs and glands are fully developed. During their childhood and adolescence the glands and organs are not functional for reproductive purposes.</span>
In hemophilia A it’s caused by a mutation in the gene for factor VIII. Hemophilia B is a result in a deficiency in factor IX due to a mutation in its corresponding gene.
In both cases, it is a mutation in the DNA (the macromolecule).
Answer:
Intraspecific Competition
Soil is made up of four major components.
- 25% of water
- 25% of air
- 45% of rock particles
- 5% of leaves
Enzymes can be divided into two groups, intracellular and extracellular enzymes.
Enzymes formed and retained in the cell are known as intracellular enzymes. They are found in the cytoplasm, organelles and the nucleus of the cell. Examples of such enzymes are DNA polymerase, RNA polymerase and ATP synthetase.
Extracellular enzymes are produced in the cell then packed and secreted from the cell. This kind of enzymes catalyze reactions outside the cell. Most digestive enzymes are extracellular enzymes . Examples of such are amylase, zymase and cellulase
