What two forces are balanced when a system is in isostasy? A. Downward gravity and upward buoyancy
B. Upward accretion and downward buoyancy
C. Downward gravity and upward heat
D. Upward gravity and downward buoyancy

Which of the following structures is not found in both plant and animal cells? a) chloroplast b) cytoskeleton c) ribosomes d) mitochondria

Many plants can reproduce asexually. which of these is an example of asexual reproduction in a plant? a. pine cones forming on a tree b. cross-pollination in a tomato c. roots sprouting from a potato d. night-blooming jasmine flowers

Contrast how pollination is different among gymnosperms and angiosperms.