A particular cross gives a modified dihybrid ratio of 9:7. What phenotypic ratio would you expect in a testcross of the fully heterozygous F1 crossed with the fully recessive type

In general, are there any major differences that you can see? explain

Archaebacteria use for movement. celia flagella pili cell walls

What type of measurement would you use to describe the density of species in each of these situations? explain your answer in each case. - sheep in a paddock - grass in a field - leaves on a plant