Intro to Animalia exclusively multicellular beingnesss share a general set of evolutionary problems. The differences we see between them aftermath from the contrastive evolutionary strategies they have used to solve those problems. All organisms demonstrate the same basic challenges: 1. Find and digest victuals 2. Find a mate and procreate 3. Avoid be eaten while doing 1 and 2 4. nourish balance with fluids and salts 5. distribute nutrients 6. Remove waste products As a response to these problems, thither 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 mind and discover sustenance from either direction * dont have to invest in entangled structures like legs or wings to move and se arch for food. Disadvantages * no way to unravel danger * develop defenses such as acidulated cells * curb to food that floats by * become a trickle self-feeder * cant reach potential mates to reproduce * curse on external fertilization * become a hermaphrodite * cannot put to workively mobilize young * have motile larvae Motile organisms tend to be bilaterally symmetric by and large higher organisms Advantages * more efficient work for moving by dint of environment * can actively seek away food and mates * can run away from predators Animals in act generally have a item direction. Forward skill allows dissimilar parts of the body to become specialized for different purposes - cephalization. Thus, motile organisms concentrate their environmental awareness on that item direction. * become cephalized develop a head end and hind end end * anterior head end; where sensory organs, int erchange anxious system and brain are locat! ed * ass tail end; where excretion and reproduction take...If you want to get a lavish essay, order it on our website: BestEssayCheap.com
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