A basket of vegetables contains carrot, potato, radish and tomato. Which of them represent the correct homologous structures?

Select the statements that describe characteristics of genes:

(i) genes are specific sequence of bases n a DNA molecule

(ii) a gene does not code for proteins

(iii) in individuals of a given species, a specific gene is located on a particular chromosome

(iv) each chromosome has only one gene

In peas, a pure tall plant (TT) is crossed with a short plant (tt). The ratio of pure tall plants to short plants in F₂ is:

Select the correct statement:

If the fossil of an organism is found in the deeper layers of earth, then we can predict that: