Answer: Potassium-40 decays into argon gas over time.
Explanation: Potassium-argon dating is a dating method used to determine the age of sedimentary rocks by comparing the proportion of K-40 to Ar-40 in a sample of rock, and knowing the decay rate of K-40.
Potassium-40 undergoes decay following first order kinetics as given below:
Because it’s good for the environment to have a good balance and not to much of one thing
RNA.
Explanation: nucleic acid makes up both RNA and DNA.
Answer:
The given statement is true.
Explanation:
Genome is not a steady entity, it is exposed to various kinds of heritable modifications, a sudden and heritable modification in the arrangement of the genome in an organism, which produces different forms of any gene is called mutation.
The mutations provide the raw material for genetic evolution, mutation leads to the generation of alleles, in the absence of mutation all the genes would prevail only in one form, and the organism would lose to the tendency to evolve and amend with the changing environments.
The energy value listed for foods refers to the amount of energy available as fuel for the body. The correct answer is option b. The energy of food is measured by kilojoules. 4.2 kilojoules is equivalent to 1 Kilocalorie. When food is eaten, some of the energy it possesses decreased due to the process of digestion and metabolism. That is why, the noted energy value of food is the value that is only available for the body to use.
