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:
in anaphase.
Explanation:
during which each chromosome's sister chromatids separate and move to opposite poles of the cell.
Answer:
Flatworms and cnidarians
Explanation:
In simple organisms, such as cnidarians and flatworms, every cell in the body is close to the external environment. Their cells are kept moist so that gases diffuse quickly via direct diffusion. Flatworms are small, literally flat worms, which 'breathe' through diffusion across the outer membrane
Answer:
B. Fertilizer can affect the growth of bean plants.
Explanation:
due to the observation. They observed that these plants, on average, were taller than another population of the same kind of bean plants that were not treated with fertilizer
<u>Advantages</u>:-
Following mentioned are a few enlisted positive effects (of using windmills):
• It is cost-free; in other words it is inexpensive or affordable.
• In fact it is and can be an alternate for fossil fuels.
• Moreover, wind energy is a domestic source of energy.
• It helps in controlling air pollution which is a huge threat to life.
• Furthermore, it utilizes merely a small amount of land the rest of which can be used by farmers wisely.
Written by: Mmkhn
