What are the characteristics of halley's comet? select all that apply.
a. long period comet
b. short period comet
c. exceptionally long orbit
d. spends most of its time in its oort cloud
e. orbits the sun about once every 75 years

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).

One gene can influence trait(s). one trait can be determined by gene(s).

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above