What type of mutation causes sickle-cell anemia?
a. deletion
b. insertion
c. frame shift
d. substitution

The rate at which molecules water and oxygen can enter a cell is determined by the-

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).

Describe the two types of vascular tissue