Answer:
Saudi Arabia is your answer ...
Explanation:
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Answer:
There is no video but ecological relationship will be defined on a general note and it is not always beneficial to organisms.
Explanation:
In an ecosystem, organisms of the same or different species tend to interact with one another. This interaction is referred to as ECOLOGICAL RELATIONSHIP between the involved organisms. An ecological relationship can be of different types depending on the effect.
SYMBIOSIS is an ecological relationship between two organisms that interact together. SYMBIOSIS can either be mutualistic (both organisms benefit), parasitic (one organism loses and one gains), or commensalistic (one organism benefits and one neither benefits or loses). Another ecological relationship is PREDATION, where one organism called the PREDATOR feeds on part or all of another organism called PREY in order to obtain energy.
As stated above, some of the organisms involved in an ecological relationship benefits while others lose. Hence, it is not always a beneficial relationship to organisms.
An alternation of generations for plants include a haploid gametophyte and a diploid sporophyte.
Answer:
1.- Arachnoid mater: Middle meninx; web-like.
2.- Dura mater<u>:</u> Tough, outer meninx.
3.- Epidural space: Space filled with adipose tissue.
4.- Pia mater: Thin meninx intimate with spinal cord.
5.- Subarachnoid mater<u>:</u> Contains cerebrospinal fluid.
6.- Denticulate ligaments
: Extension of pia mater attaching to dura.
Most of legumes have symbiotic, nitrogen-fixing<span> bacteria, that live in structures called "</span>root nodules"<span>. </span>
