Multicellular organisms require a lot of energy and resources to survive.
Unicellular organisms, on the other hand, require just the basic necessities. On top of that, unicellular organisms don't require a long time to reproduce as multicellular organisms do.
Thus, multicellular organisms are at a disadvantage because they require more energy, sources, and essentially time.
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Ice is less dense than liquid water.
this is because the particles are further apart (due to hydrogen bonding), so in the same volume there are LESS particles in ice than there is in the same volume of water.
<span>The lymphatic system is considered as the subsystem of the circulatory
system that is composed of networks of vessels, tissues and organs in vertebrates.
Its anatomy is composed of lymph nodes and lymphatic vessels which connect the
other parts systematically. A picture of the lymphatic system is attached below.</span>
Answer:
The evolution of the pillar coral as an organism dependent on the zooxanthellae can be demonstrated by an experiment conducted by the student.
Explanation:
Zooxanthellae are photosynthetic algae which reside in the tissues of most of the reef-building corals. Both of this exhibit mutualistic relationship where in the corals protect the algae and also provide the necessary compounds for photosynthesis. The algae in return of this, produces and provides oxygen and also helps the coral remove its wastes. A student can conduct an experiment on this phenomenon of mutualistic behaviour by removing the zooxanthellae from the corals which may even kill the coral.