This is because they contain air: that feeling comes from the air sacs in your body being squashed by the pressure of the water. Fish living closer to the surface of the ocean may have a swim bladder – that's a large organ with air in it, which helps them float up or sink down in the water
According to this initial single gene autosomal cross, Mendel would have observed that the resulting offspring in the F1 or first filial generation are Tall. This is because, of the allele relationship that he observed, which is simple complete dominance.
The dominant or preferred allele or nucleotide sequence is used for the production of the protein, to allow for the appropriate colour.
Genotype would all be heterozygous Tt.
An element is a pure substance that cannot be broken down by a chemical reaction.
Mast cells
hope this helped
