Answer:
Observation
Explanation:
They are observing the way that population has decreased
Answer:
Many years ago scientists believed that protein, DNA is not the genetic material because of many reasons like DNA is made up of only four type of nucleotides while proteins are made up of 20 different types of amino acids. So the building blocks of protein are way high than DNA.
Most of the cellular function is performed by proteins, not DNA. The three-dimensional shape of protein is much higher than nucleic acid. So as protein heterogeneity was high therefore it was considered as a molecule of genetic information instead of DNA.
The most important mineral for strong bones is calcium. Calcium is the chemical element of atomic number 20, a soft gray metal.
Answer:
calcium
Rockskipper, Pufferfish and Peacock Flounder