Essay

essay on the many different types of relationships and interactions between organisms

1 purchase

Course
Synoptic essay paper 3

Institution
AQA

This essay is an example of what could be asked at the end of AQA A - Level Biology paper 3 as part of the synoptic section. This essay achieved 21/25 and the student finished the course with a grade A.

[Show more]

Preview 1 out of 2 pages

View example

Uploaded on September 20, 2022
Number of pages 2
Written in 2022/2023
Type Essay
Professor(s) Unknown
Grade A

species
population
courtship behaviour
cellular
relationships
interactions

Study Level
A/AS Level
Examinator
AQA
Subject
Biology
Unit
Synoptic essay paper 3

freyafarmery

Member since 2 year 11 documents sold

$6.76

Add to cart

Save

100% satisfaction guarantee
Immediately available after payment
Both online and in PDF
No strings attached

Write an essay on the many different types of relationships and interactions between
organisms (25 marks)

There are numerous ways in which organisms interact with one another, this can take place
on a large scale, such as how humans have an impact on ecosystems at a global scale, and
also a much smaller scale, for example how a virus interacts with a host cell.

One way in which organisms Interact with one another is through courtship behaviours. This
is when organisms of the same species use certain behaviours in order to attract mates of
the same species. A species is a group of organisms that share a common ancestor and are
able to interbreed to produce fertile offspring. An example of courtship behaviours can be
seen in fireflies. There are many species of fireflies, and so when needing to mate, it is
important that an individual attracts an organism of the same species in order for successful
reproduction to occur. Some fireflies use bioluminescence. They will have certain patterns of
flashing when searching for a mate and the pattern that is produced by the signal will only
attract a meteor the same species as they will recognise that pattern and will be attracted by
it, which will then lead to successful mating.

Organisms of different species also interact in various ways. Prey and predator
interrelationships allow both of the populations to survive. They go through natural cycles
where the number of both populations rise and fall based on availability of prey and the
amount of predators. Numbers fluctuate and help the populations to remain at a stable and
sustainable level as when prey numbers increase, predator numbers also increase as there
are more prey to feed on, helping to control prey numbers. Then as the number of prey falls,
the number of predators also fall as food sources become more limited, ensuring that the
prey population is not fully removed from an ecosystem. These healthy cycles allow for both
populations to be able to live in the same ecosystem, allowing higher biodiversity and also
controlled populations. This can also benefit other organisms within the ecosystem. For
example, a species of wolf was reintroduced to Yellowstone national park in the state of
Wyoming to help control elk population. As the elk had no predators and so over time, the
land became overgrazed. When the wolves were introduced, the elk had to stay on the move
and so the land had time to grow and the elk population became more stable. As the land
was able to regrow, other organisms such as birds and bears returned as berries could grow
on bushes, rabbits returned as the grass regrew and river banks sprouted small trees which
changed the course or rivers, helping beaver populations, which in turn created pools that
provided homes for species of fish.

However, humans can negatively affect the relationships between organisms. There are
numerous ways in which human activity has negatively impacted the environment. An
example of this is by constructing dams and reservoirs to store water for irrigation. The
Mekong river, which flows through several Asian countries including Cambodia, China,
Vietnam and Thailand, has been dammed numerous times to store water for irrigation in
farming and to generate hydroelectric power. During the construction process, areas of
forest and other land had to be cleared so that machinery could enter. This led to the
destruction of the surrounding ecosystems and a loss of biodiversity. The machinery is also
run by fossil fuels which leak into the water and contaminate it with pollutants, causing
damage to the surrounding aquatic ecosystems. In the

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller freyafarmery. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $6.76. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

64257 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling

Seller

Exam (elaborations) ·

Essay

essay on the many different types of relationships and interactions between organisms

Document information

Subjects

Written for