B2d-interdependence Flashcards Preview

Biology > B2d-interdependence > Flashcards

Flashcards in B2d-interdependence Deck (14)
1

what is interspecific competition?

when organisms compete for resources against individuals of another species

2

what is intraspecific competition?

when organisms compete for resources against individuals of the same species

3

why is intraspecific competition often more significant?

individuals of the same species have exactly the same needs

4

what is an ecological niche?

how a species fits in to its ecosystem.
it depends on things like where the individuals live and what they feed on

5

what happens to prey when predators increase?

prey will decrease

6

what happens to predators when prey increases?

predators will increase

7

why are predator and prey population cycles are out of phase with each other?

it takes a while for one population to respond to changes in the other population
eg reproduction

8

what are the two types of interdependence between organisms?

parasitism
mutualism

9

what is paratism?

where the parasite benefits to the living hosts detriment, including fleas and tapeworms

10

what is mutualism?

where both species benefit including cleaner species and pollination by insects

11

why is nitrogen fixing bacteria in the root of leguminous plant an example of mutualism?

the bacteria get food from the plant
the plant gets nitrogen compounds from the bacteria to make into proteins

12

how does the the interdependence of organisms determines their distribution and abundance?

some organisms depend entirely on other species to survive
abundance- population size

13

what are examples of paratism?

tapeworms absorb nutrients from the host
fleas

14

what are examples of mutualism?

-oxpeckers(cleaner species) live on buffalo
oxpecker gets food
buffalo gets pests removed
-plants pollinated by insects
plants reproduce
insects get nectar