BIo Unit 6 G10

Ecological interaction

………. Occupy more than one position in the food chain

Omnivorous

………. Is an interconnected food chain that makes interwoven structures

Food web

….. Follows a single path

Food chain

……. Indicates the position of the organism in an order of receiving energy and usually ranges form 1 to 4

Trophic level

What stands at the first trophic level

Plants

What is the position of herbivorous and carnivorous animals in trophic level

2nd and 3rd

…….. Are ar the first feeding level of consuming plants also known as primary consumers

Herbivorous

….. That eat herbivorous stand at the second feeding level

Carnivorous

As energy flows from one trophic level to the next ir successively…….. In amount

Decreases

The three types of ecological pyramids

Pyramid of energy, pyramid of biomass and pyramid of number

Four elements that cycle through the ecosystem

Oxygen, carbon, nitrogen and phosphorus

……….. Is the conversion of N₂ into ammonia either biologically or non biologically

Nitrogen fixation

………. Kind of nitrogen fixation is carried out in the root nodules of leguminous plants such as peas and beans by the soil bacteria known as rhizobia

Symbiotic

The nitrogen fixation reaction is catalyzed by an enzyme known as

Nitrogenase

……… form of nitrogen fixation is carried out by free living soil bacteria

Non-symbiotic nitrogen fixation

Is a microbial process by which ammonia is sequentially oxidized, converted frist to nitrite and then to nitrate

Nitrification

Ammonification

s the process where decomposers convert organic nitrogen in dead organisms and waste into ammonia (NH₃) or ammonium ions (NH₄⁺).

Denitrification

where certain bacteria convert nitrates (NO₃⁻) into nitrogen gas (N₂), which is released back into the atmosphere.