Explain some of the factors that make it difficult for geologists to learn about the precambrian era.

Explain why biological control methods are generally environmentally superior to chemical pest control methods.

What kind of macromolecule is made from amino acids? carbohydrate protein lipid nucleic acid

Name another animal that can be grouped in group s and t(i)group (i)group group s is sharp thorns (except puffer fish and porcupine)group t is poisonous sting (except snake and scorpion )*can u me with this question* pl