The equation for the chemical reaction shown is not balanced. what number should replace the question mark to balance this equation? 2al + ? cl2 → 2alcl3 a. the number 2 b. the number 4 c. the number 3 d. the number 5

Imagine ? person stepping on a pin and pulling his or her foot way look at the réfléchir arc of the scenarios below

Use the above pedigree for questions 1,2, and 3 1. what kind of genetic disorder is represented in the pedigree? a. recessive b. dominate refer to the pedigree in question 1. 2. is the mutated gene in this disorder located on a sex chromosome (x or y) or an autosome? a. sex chromosome b. autosome refer to the pedigree in question 1. 3. which generation has individuals that you are certain are heterozygous for the mutated gene? a. generation 1 b. generation 2 c. generation 3

Why should organisms reproduce more offspring than will survive? select all that apply.