Assume that you touch poison sumac and still have not developed a rash 12 hours later. Can you safely assume you are not allergic to the plant? Why or why not?

Why does sexual reproduction introduce variety or variation ina species in 3 ways

What are the minimum requirements for an ecosystem to recycle nutrients?

Name the three main groups within the Kingdom Protista

Which of the following is a change in the sequence that leads to formation of a stop codon? missense mutation nonsense mutation silent mutation deletion mutation

Mrs. Gibbs cannot seem to catch up with the eating habits of her 14-year-old daughter Zondra and 16-year-old son Austin. Her weekly grocery shopping is never enough to keep the pantry stocked.

Why does the meiosis produce cells with only half the amount of DNA? How does this aid in the formation of a healthy zygote?

Which way does the sun's gravity act on any body in orbit? A. pulls it forward in its orbit B. pulls it backward in its orbit C. pulls it toward the sun

Which two processes result in variations in sexually reproducing species? (1) mutation and genetic recombination (2) mitosis and natural selection (3) extinction and gene replacement (4) selective breeding and cloning

How was the amount of food caught by a heron related to change in biotic and abiotic factors?

Which ecosystem demonstrates the lesser biodiversity? Why?