Coevolution is the name given to a long term change that takes place in two species because of their close interactions with one another.
Coevolution occurs when the evolution of two or more species mutually depends on each other or influences each other due to their close ecological interactions. Coevolution can create interactions such as predators and prey, parasites and hosts, mutualism and competition.
An example of coevolution is mutualistic interaction between flowering plants and associated pollinators (such as insects) which have ecological interaction and mutually depend on one another. This species are believed to evolve together or probably came together after some time and are mutually adapted. Their interaction is as a result of coevolutionary process.
<span>Echinoderms are invertebrate animals
with radial symmetry. They reproduce mostly through external fertilization.
They have endoskeletons that are made up of hardened plates. Examples would be
sea stars, sea urchins and sea cucumbers. </span>
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The simplest invertebrate animal is
the sponge. They have no organs and are considered the most ancient member of
the kingdom Animalia. It was once thought to be a plant but the way it takes in
food qualified it to be an animal.
Animals in the phylum porifera, more
commonly known as sponges are marine animals. They are mostly asymmetrical and
they self-fertilize because they are mostly hermaphrodites. In other words,
eggs and the sperms are produced by the same organism.
Fish are vertebrate animals that have
bodies that are bilaterally symmetrical. They reproduce through external
fertilization. They belong in the class called Osteichthyes.
<span>Cnidarians exhibit radial symmetry.
They reproduce both asexually and sexually. Budding however is the most
important form. They are invertebrates that are known for their central body
cavity and stinging cells. Examples would be the jellyfish and the hydra.</span>
Mammals are vertebrates with
bilateral symmetry. They have endoskeletons and are known to reproduce sexually
through internal fertilization. They give birth to live young. The only mammal
that is known to lay eggs is the platypus.
Arthropods are invertebrates with
exoskeletons, jointed appendages and segmented bodies. Their bodies show bilateral
symmetry. They reproduce sexually. Insects are arthropods, so are crustaceans,
arachnids and the like.
The correct answer is letter c. traps heat.
The Earth's Atmosphere deals with the sunlight it absorbs in the day, absorbing it and spreading it, which heats up the planet, but at night, the sunlight absorbed weakens and the Earth cools up, but due to the greenhouse effect, it traps certain amounts of heat, which results to hotness of the weather. Greenhouse Effect doubles the heat, because it traps heat when heat tries to leave our atmosphere.
The answer is coral Z. This is because it thrives in the
least maximum depth. Shallow coral is vulnerable to changes in the sea surface temperatures that is caused a
phenomenon called coral bleaching. Coral bleaching
is the expulsion of zooxanthellae
by coral-polyp from their symbiotic relationship. This causes the eventual death of
the coral. The temperatures in oceans vary with
depth since the sun rays can only penetrate to a certain depth (this is why it gets colder with the depth of the
ocean).