Term
|
Definition
| Plays a central role in holding a community together because other species depend on it. The removal of a keystone species has a dramatic impact on the community. |
|
|
Term
|
Definition
| the transfer of pollen (small, thick-walled plant structures that contain cells that will develop into sperm) |
|
|
Term
|
Definition
| Consists of a stem-like filament topped with a pollen-saturated anther. |
|
|
Term
|
Definition
| The pistil is topped with a sticky “landing pad” called a stigma. |
|
|
Term
| A fertilized egg will eventually develop into an embryo-containing ______, while the surrounding ovary eventually becomes the fruit. |
|
Definition
|
|
Term
|
Definition
| the linked sequences of feeding relationships in a community in which organisms further up the chain feed on those below them. |
|
|
Term
|
Definition
| autotrophs that obtain energy directly from the sun and supply it to the rest of the food chain. |
|
|
Term
|
Definition
| heterotrophic organisms that eat the producers or eat other organisms lower on the chain to obtain energy |
|
|
Term
|
Definition
| an interaction between two organisms in which one organism (the predator) feeds on the other (the prey). |
|
|
Term
|
Definition
| is predation on plants, which may or may not kill the plant preyed on. |
|
|
Term
|
Definition
| feeding levels, based on positions in a food chain |
|
|
Term
| Only about ___ of the energy at the lower level is passed from one organism to the next organism in the chain. |
|
Definition
|
|
Term
| Not all of the energy stored in a lower level makes it to the level above it; at each step, much of this energy is _____ from the chain. |
|
Definition
|
|
Term
|
Definition
| feeding relationships in a community. |
|
|
Term
|
Definition
| a type of symbiotic relationship in which one member benefits at the expense of the other. |
|
|
Term
|
Definition
| a type of symbiotic relationship in which both members benefit. |
|
|
Term
|
Definition
| a type of symbiotic relationship in which one member benefits and the other is unharmed. |
|
|
Term
|
Definition
| the space, environmental conditions, and resources (including other living species) that a species needs in order to survive and reproduce. |
|
|
Term
| When two or more species rely on the same limited resources – that is, when their niches overlap – the result is _________. |
|
Definition
|
|
Term
| __________ tends to limit the size of ___________ populations and may even drive one out. |
|
Definition
|
|
Term
| Competitive Exclusion Principle |
|
Definition
| The concept that when two species compete for resources in an identical niche, one is inevitably driven to extinction. |
|
|
Term
| Very few species share exactly the same niche, so different species may find a competitive balance by ___________ ____________. |
|
Definition
|
|
Term
| What is causing colony collapse disorder? |
|
Definition
Stress and nutrition
Pesticides
Nosema ceranae parasite
Israeli acute paralysisvirus |
|
|
