Which of the following is an example of reproductive isolation? two populations of finches that cannot produce viable offspring
two populations of finches that have different feather colors
two populations of salamanders that live in different lakes
two populations of salamanders that have different tail lengths

satellites are frequently used to make observations of the orbit on earth

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

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.