The last option, adding sugar to milk to form sweetened milk, is a physical change
Hi there! Hopefully this helps!
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Scientists use a two-name system called a Binomial Naming System. Scientists identify animals and plants using the method that defines the variety and species of the organism. The primary word is the genus, and the secondary is the species.
If you eat more than the needed 2,000 calories you will gain weight
Crossing over happens in prophase I when the homologous chromosomes are sy naps ed. The two inner chromoatids exchanges sections with each other. This means that after the exchange the inner two chromatids have new combinations of alleles than their parents had. The two outer chromatids still have the parental combinations.So there are more kinds of chromatids ready to go into the gametes than there were before. This is an increase in variation.