(Question)
If starfish use pheromones to communicate with each other, then how do starfish communicate? Answer choices: - huddle together - sound - interact - Vibrates - wave in air - during the day - Decibels - Pheromones
(Answer)
Pheromones

(Question)
If pollution is usually harmful to population size of a species, then what is usually harmful to the population size of a species? Answer choices: - Pollution - reproduction - viruses - disease - habitat - ecosystems - influenza - deforestation
(Answer)
Pollution

(Question)
If plant reproduction often requires bees, then what does plant reproduction often require? Answer choices: - DNA - global warming - energy - droughts - seeds - bees - food - legumes
(Answer)
bees