Answer: B. by toxic chemicals (in smoke) or radiation that can damage the DNA in cells.
Explanation:
The carcinogens presents in cigerates covalently bind to DNA and form DNA adducts which results into miscoding (e.g., insertion of the wrong base) during replication of DNA and this genetic mutation causes uncontrolled cellular growth which causes cancer.
Ionising radiation including X-rays, radioactive particles, and gamma rays,can cause cancer by damaging DNA. high-energy radiation damages DNA and cause genetic mutation same as cigerates and causes cancer.
Both toxic chemicals (in smoke) or radiation damages DNA inthe cells which leads to cancer.
Hence, the correct option is B.
Answer:
Plant cell has cell wall but animal cell dont.
A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. In contrast, animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. ... Animal cells simply have a cell membrane, but no cell wall.
Answer:
(a) Monoecious
Explanation:
Monoecious refers to plants which have both male and female reproductive organs. Most of the plants have both male and female reproductive organs.
Dioecious describes a plant group that have distinct male and female plants. monoecious is also known as single house as male and female are found in single individual and dioecious is also known as double house as it has distinct male and female plants
Answer:
A series if reaction break and rrarrange csrbon bonds to release energy ang carbon dioxide.
