Hepatitis 'C' may be dormant in the body for years before the signs and symptoms. Hepatitis A, B, and C are cause by a virus. Hepatitis A is also known as Infectious Hepatitis, Hepatitis B is also known as serum Hepatitis. Hepatitis C is a viral infection that causes liver inflammation, sometimes leading to serious liver damage, it spreads through contaminated blood.
Tumor suppressor genes encode for proteins that inhibit or slow the progression of the cell cycle through a specific stage.they also encode for check point control proteins that arrests the cell cycle if the DNA is damaged or the chromosomes are abnormal. Mutation in the tumor suppressor genes that cause a loss or decreased function would lead to uncontrolled cell cycle leading to abnormal proliferation and the cell may become cancerous.
Answer: C. Black snakes will not prey on cane toads in areas where cane toads have been present for 40–60 years.
Explanation:
Cane toad secret a toxin called bufotoxin which is a defense mechanism against predators. These defense mechanism is capable of killing black snakes if they eat cane toads. Within a period of 40 to 60 years, the black snakes in these area will be aware of the presence of a toxin capable of killing them in cane toads and will not prey on them. This phenomenon is termed learned behavioral adaptation.
12. D
13. B
14 . C
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The backbone of the DNA is made up of phosphate and deoxyribose. Deoxyribose is the sugar molecules found in DNA
