Science Crossword

3. An organism, often a bacterium, fungus, or invertebrate that feeds on and breaks down dead plant or animal matter, making organic nutrients available to the ecosystem.
9. a relationship between individuals of two species in which one species obtains food or other benefits from the other without either harming or benefiting the latter.
10. an organism that mostly eats meat, or the flesh of animals
11. an organism that regularly consumes a variety of material, including plants, animals, algae, and fungi.
12. Food chain, in ecology, the sequence of transfers of matter and energy in the form of food from organism to organism. Food chains intertwine locally into a food web because most organisms consume more than one type of animal or plant. ... In a predator chain, a plant-eating animal is eaten by a flesh-eating animal.
13. an interaction between individuals of different species that results in positive (beneficial) effects on per capita reproduction and/or survival of the interacting populations.
14. an animal that feeds on carrion, dead plant material, or refuse.
17. anything that constrains a population's size and slows or stops it from growing. Some examples of limiting factors are biotic, like food, mates, and competition with other organisms for resources.
18. a living organism that shapes its environment. In a freshwater ecosystem, examples might include aquatic plants, fish, amphibians, and algae.

1. organisms capable of creating simple carbohydrates such as glucose, from gaseous carbon dioxide
2. a larger organism that harbours a smaller organism; whether a parasitic, a mutualistic, or a commensalist guest (symbiont). The guest is typically provided with nourishment and shelter.
4. the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
5. any of several living arrangements between members of two different species, including mutualism, commensalism, and parasitism. Both positive (beneficial) and negative (unfavorable to harmful) associations are therefore included, and the members are called symbionts.
6. relationship between two species of plants or animals in which one benefits at the expense of the other, sometimes without killing the host organism.
7. animals whose primary food source is plant-based.
8. an individual animal, plant, or single-celled life form.
15. a nonliving condition or thing, as climate or habitat, that influences or affects an ecosystem and the organisms in it
16. animals that live by preying on other organisms for food.