The number of connections among species
Stars are balls of gasses while planets are gasses and rock
A dominant trait can be shown both when an organism is homozygous dominant AND heterozygous. Two different genotypes give the same visible result so a testcross is needed to be able to accurately say if the organism is homozygous dominant or heterozygous
Answer:
D.
Explanation: Ecology: relation of organisms with one another or their surroundings.