When two different strains of bacteria are cultured together in the same petri dish, their populations are not as great as compared to when cultured alone. What type of interaction does this scenario represent?competition disease

predation

parasitism

sex cells are usually half's then they find another half and make a fertilize egg

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.

protein makes up the building blocks of organs, muscles, skin, hormones and pretty much everything that matters in your body.

some choices are:

peanut butter

seeds

eggs

yogurt

meats

fish

so pretty much meat, dairy, nuts, and grains.