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Describe the main evolutionary trend in digestion across the phyla: Platyhelminthes, Chordata and Annelida

In platyhelminthes digestion is both intracellular and extracellular whereas in annelida and chordata digestion is completely extracellular.
JH
Answered by Jade H. • Biology tutor
3205 Views

y = x^2 + 3x + 2 = 0

Factorising gives: y = (x+2)(x+1) = 0. y only equals 0 when (x+2)=0 or (x+1)=0. Therefore x=-2 or x=-1
DT
Answered by Dr Thomas P. • Maths tutor
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How can I make my personal statement stand out from everyone else's?

Personal statements are just that, personal . The admissions staff want to know about you, so don't be shy! Everyone has a different story to tell, and has experienced the world in a different way. Think abo...
BE
2894 Views

What is the difference between xylem and phloem?

Plants have both xylem and phloem. The xylem is a tube which runs from the very ends of the roots to all other parts of the plant. Xylem transport water and minerals around the plant . Xylem are tough- they ...
BE
Answered by Britannie E. • Biology tutor
6230 Views

Show how you would give all elements that have a class of 'class1', a green background.

.class1{ background-color: 'green'; } The full-stop before the text indicates that this css rule applies to a class with the name 'class1'.Inside the rule, the background-color attribute is given a value of ...
JC
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