Answer:
Lichens are not purely mutualistic relationships.
Explanation:
Answer:
They provide the body with energy.
Explanation:
<u>Answer:</u>
The<u> Lead </u>toxicity can result in slow growth and iron-deficiency anemia, and can damage the brain and central nervous system.
<u>Explanation:</u>
Lead poisoning is a form of metal poisoning in the body which is triggered by lead. The most prone of these is the brain. Signs can be abdominal pain, indigestion, fatigue, irritability, problems with memory, failure to have children and numbness in the hands and feet.
It triggers nearly 10 per cent of quite unknown cause's intellectual disability and can lead to behavioral problems. A few of the consequences are irreversible. In extreme cases there may be coma, anemia, seizures or death.
Answer:
C) The amount of A is always equivalent to T, and C to G
Explanation:
Chargaff's rule was given by the Austrian chemist, Erwin Chargaff in late 1940s. It explains the composition of the four bases i.e. Adenine(A), Guanine(G), Thymine(T) and Cytosine(C) in a DNA molecule. According to it, purine and pyrimidine bases are always found in 1:1 ratio in a DNA molecule. A and G are purine and T and C are pyrimidine bases and a purine always forms a pair with pyrimidine base hence the amount of A will always be equal to T and amount of G will always be equal to C. This rule forms the basis for the Watson and Crick pairs in DNA double helix model.
