Echinoderms use pheromones to communicate with each other, and another group of echinoderms are the echinoids. Given these facts, what do echinoids use to communicate among the following options: - light - Chemical energy - Decibels - pheremones - writing - Energy - heat produced - language
pheremones

If an object reflects light toward the eye then that object can be seen, and light is made up of particles called photons. Given these facts, if an object reflects what toward the eye then that object can be seen among the following options: - observe it - sunlight - ultraviolet light - neutrons - Joules - photons - x-rays - positive
photons

Q: Evolution is a change in the characteristics of living things over time, and trees are the largest of living things. Given these facts, evolution changes the characteristics of what over time among the following options: - the Moon - Man - life - trees - rocks - the Sun - humans - plants
A: trees

Question: Eating something that contains pollutants has a negative impact on an organism 's survival, and pollution can kill living organisms directly and selectively, affecting biodiversity in the oceans. Given these facts, eating something that contains what can kill directly and selectively among the following options: - berries - candy - pollutants - Pesticides - influenza - humans - mushrooms - viruses
Answer: pollutants

*Question*
Yeast reproduce asexually by budding, and yeasts, for instance, reproduce by forming spores as well as by budding. Given these facts, what do yeast use to reproduce among the following options: - Energy - spores - sunlight - alleles - A kernel - pollen - propagate - seeds
**Answer**
spores

Q: An animal requires nutrients to grow and heal, and food is the ideal source of nutrients. Given these facts, what does an animal require food for among the following options: - hydration - to grow and heal - for cold - aerobic capacity - organic molecules - food and shelter - to chill - for electricity
A: to grow and heal