(b) Aphids are major pests of crops. Their population can be naturally controlled by predators and parasites.
(1) Explain why some crop farmers may be advised not to spray with pesticides when they
first see aphids on their crop.
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Which of the following systems in absorbing oxygen and releases carbon dioxide

Casts and mold are a type of preservation where the original material decays, leaving a mold in surrounding rock that can be filled with another sediment a. true b. false

Dna, in the nucleus carries the genetic code for making proteins in ribosomes. in the diagram, b, represents the proteins produced. dna cannot leave the nucleus to carry the genetic information to the ribosome where proteins are produced. how does the genetic code get from the nucleus to the ribosome? what does a represent? now