The function of which cell part is most similar to that of the human excretory system

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred

Living things that cannot make there own food are called what

Which is not a reason to gentically modify an organism? a.changing the dna of a crop plant to make it resistant to pesticides b.changing the dna of a crop plant to make it produce more yield per acre c.changing the dna of a crop plant to make it resistant to insects d.changing the dna of a crop plant to make it more susceptible to pest insects