Intro to Animalia alto modernizeher multicellular beings share a general set of evolutionary problems. The differences we see between them conduct from the contrastive evolutionary strategies they have used to solve those problems. All organisms demonstrate the same basic challenges: 1. Find and digest provender 2. Find a mate and purge 3. Avoid creation eaten while doing 1 and 2 4. nourish balance with fluids and salts 5. pass out nutrients 6. Remove waste products As a response to these problems, in that location are three very sound modes of existence that an organism can adopt: 1. Sessile or Motile 2. aquatic or Terrestrial 3. Small or Large sessile OR MOTILE Sessile organisms t death to be radially symmetric Advantages * awareness of your purlieu is omnidirectional can aesthesis and get food for thought from either direction * dont have to invest in entangled structures like legs or wi ngs to move and search for food.
Disadvantages * no way to run away danger * develop defenses such as acidulated cells * trammel to food that floats by * become a trickle feeder * cant reach potential mates to reproduce * curse on external fertilization * become a hermaphrodite * cannot forgeively mobilize young * have motile larvae Motile organisms tend to be bilaterally symmetric broadly speaking higher organisms Advantages * more efficient work for moving through and through environment * can actively seek away food and mates * can run away from predators Animals in act generally have! a item direction. Forward consummation allows assorted parts of the body to become specialized for different purposes - cephalization. Thus, motile organisms concentrate their environmental awareness on that special(prenominal) direction. * become cephalized develop a head end and tooshie end * anterior head end; where sensory organs, primordial anxious system and brain are located * cornerstone tail end; where excretion and reproduction take...If you want to get a lavish essay, order it on our website: OrderCustomPaper.com
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