If you look at site 23 of the chromosomes, you can see whether the person is male of female:
Male: XY
Female: XX
There<span> are many plant-</span>like protists<span>, such as algae, that get </span>their<span> energy from sunlight through photosynthesis. Some of the </span>fungus-like protists, such as the slime molds decompose decaying matter. The animal-like protists<span> must "eat" or ingest </span>food<span>.</span>
<span>How many openings are in the digestive system of flatworms? Answer: 1
Flatworms digestive system is called 2-way which mean the same opening is used for eat and removing waste. That's why it only has one opening. Human system is one way since we eat from the mouth and remove waste from the anus.</span>
D. He controlled variables by studying one or two traits at a time
