Biodiversity

Let's review the test:

Question 1

The most correct answer is c.
Biodiversity is the variability among living organisms from all sources, including terrestrial, marine, and other aquatic ecosystems and the ecological complexes of which they are part; this includes diversity within species, between species, and of ecosystems.

Bibliography
https://www.greenfacts.org/en/index.htm

Question 2

The most correct answer is a.
Jelly fish is mainly a free-swimming marine animal with umbrella-shaped bells and trailing tentacles and belong to plankton. Salinity is an abiotic factor of marine ecosystem and sea gull is a sea bird who breed and feed in marine, freshwater, or terrestrial habitats

Bibliography
https://biologydictionary.net/marine-ecosystem/

Question 3

The most correct answer is c.
Invasive species are capable of causing extinctions of native plants and animals, reducing biodiversity, competing with native organisms for limited resources, and altering habitats.

Bibliography
https://oceanservice.noaa.gov/facts/invasive.html

Question 4

The most correct answer is b.
The main cause of the loss of biodiversity can be attributed to the influence of humans on the world’s ecosystem, In fact humans have deeply altered the environment, and have modified the territory, exploiting the species directly, for example by fishing and hunting, changing the biogeochemical cycles and transferring species from one area to another of the planet.

Bibliography
https://www.greenfacts.org/en/biodiversity/l-3/4-causes-desertification.htm

Question 5

The most correct answer is b.
An invasive species can be any kind of living organism—an amphibian, plant, insect, fish, fungus, bacteria, or even an organism’s seeds or eggs—that is not native to an ecosystem and causes harm. They can harm the environment, the economy, or even human health. Species that grow and reproduce quickly, and spread aggressively, with potential to cause harm, are given the label “invasive.”

Bibliography
https://www.nwf.org/Educational-Resources/Wildlife-Guide/Threats-to-Wildlife/Invasive-Species

Question 6

The most correct answer is b.
Marine Protected Areas (MPAs) involve the protective management of natural areas according to pre-defined management objectives. MPAs can be conserved for a number of reasons including economic resources, biodiversity conservation, and species protection. They are created by delineating zones with permitted and non-permitted uses within that zone

Bibliography
https://www.iucn.org/theme/marine-and-polar/our-work/marine-protected-areas