Chromosome is to cactus as gene is to needle.
<span>There are two major theories that will explain on research on colour vision. They are 1. the trichromatic theory also known as the Young-Helmholtz theory 2. opponent-process theory. These two theories explain processes that operate at different levels of the visual system.</span>
<u>answer:</u> natural selection
Answer:
Canis Lupis is considered a scientific name for a wolf. E coli is not a scientific name and German shepherd is a breed. Paramecium is a single called protozoan