If pathogens can cause Mad Cow, then what can cause Mad Cow? Answer choices: - Pollution - bacteria - cows - horses - illness - pathogens - influenza - chickenpox
pathogens

If plant reproduction often requires something that causes allergies, then what is required for plant reproduction? Answer choices: - By wind and rain - Something that is found on a cloud - fertilization occurs - Males and females - Something that comes from a volcano - Something that is invisible - Something that causes allergies - sperm and egg fuse
Something that causes allergies

If cactuses respond to daily and seasonal cycles and to disease, then what responds to daily and seasonal cycles and to disease? Answer choices: - bees - insects - resistance - agriculture - humans - tortoises - cactuses - vegetation
cactuses

If plants respond to temperature, then what do plants respond to? Answer choices: - Chemical energy - Vibrations - heat energy - Sulfur dioxide - Temperature - sun's heat - Clouds - Wood
Temperature