Natural selection on

peppered moths vary in darkness. some have a lighter coloration and some have a darker coloration. before the industrial revolution only 2% of the moth population was darker coloration. after the industrial revolution, 95% of the population showed this darker coloration. birds eat the moths they can see on the trees.

Which of the following descriptions of proteins are true? i. proteins can have different sequences of amino acids. ii. proteins can have different shapes. iii. proteins can have different numbers of amino acids. a. only i and ii are true. b. only ii and iii are true. c. only i and iii are true. d. i and ii and iii are all true. e. none are true statements

92 sathe best for the question 11. most animals and plants reproduce sexually. this means that dna is passed down to new organisms from two parental organisms. which of the following is a key advantage of sexual reproduction?

2. sketch the inside of the bean nodule, and describe or label what you observed with the hand lens.