Which of the following is true ? 1. all populations in an ecosystem form the community. 2. a habitat represents all the biotic factors in an ecosystem. 3. the amount of nutrients in soil is an example of a biotic factor. 4. only one population can live in a habitat at a time

Which of the following represents a negatively charged ion? of t 7

What evidence did mendel find that supported his law of independent assortment? a. dominant traits are expressed when there is a dominant allele. b. traits do not affect the inheritance of other traits. c. some traits have three or four different alleles. d. plants and animals can both reproduce sexually.

Flock x flock y flock z total pieces of food eaten (from previous page) 147 93 60 food percentage* % % % simulated number of birds in flock for 3rd generation** * divide each flock's total pieces of food by 300, the total number of pieces of food eaten. ** multiply the food percentage for each flock by the total number of birds (30).