bk2 ch6.3 Flashcards
(16 cards)
What is the chemical reaction for photosynthesis?
carbon dioxide + water → glucose + oxygen
in the presence of sunlight
Organisms who produce their own food are known as…
producers or autotrophs.
Organisms who don’t produce their own food are known as…
consumers or heterotrophs
What is a trophic level?
a level in a food chain
What does the term Biodiversity refer to?
Biodiversity refers to the number of different species
present in a community.
Do communities with higher biodiversity survive environmental changes better or worse than communites with low biodiversity, and why?
Better, There are usually many different sources of food in a community of high biodiversity: there are alternatives if one food source is destroyed.
E_____ in an ecosystem moves in o_____ d_____ only.
Energy, one direction
At each level of the food chain energy is…
lost
Fragments of dead organic material present in soil are referred to as d_____. Those organisms that eat
or ingest this material are called d_____.
detritus, detivores
The term o_____ m_____ refers to
all matter that comes from living
organisms. All of this matter contains
the element _____.
organic matter, carbon
Organic matter is recycled within the ecosystem due to the activity of d_____
decomposers
What do decomposers do?
break down the organic matter in dead bodies of plants and animals and releases the nutrients they contain for plants to use in their growth.
What part of the food chain are bacteria and fungi?
decomposers
No plant or animal living in a community lives in i_____. This interaction may be by direct c_____, especially when predators eat other animals! It can also be indirect as in the case of c_____ for f______.
isolation, contact, competiton for food
The different types of interaction include:
mutualism (symbiosis), commensalism, amensalism, competition, exploitation (predation, herbivory, parasitism)
Some parasites kill their host. These are called p_____
parasitoids
