\documentclass[10pt,a4paper]{article}

% Packages
\usepackage{fancyhdr}           % For header and footer
\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
\usepackage[T1]{fontenc}        % Without this we get weird character replacements
\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{AlexHoratio (Horatio)}
\pdfinfo{
  /Title (bio-012-metazoa.pdf)
  /Creator (Cheatography)
  /Author (AlexHoratio (Horatio))
  /Subject (BIO-012 - Metazoa! Cheat Sheet)
}

% Lengths and widths
\addtolength{\textwidth}{6cm}
\addtolength{\textheight}{-1cm}
\addtolength{\hoffset}{-3cm}
\addtolength{\voffset}{-2cm}
\setlength{\tabcolsep}{0.2cm} % Space between columns
\setlength{\headsep}{-12pt} % Reduce space between header and content
\setlength{\headheight}{85pt} % If less, LaTeX automatically increases it
\renewcommand{\footrulewidth}{0pt} % Remove footer line
\renewcommand{\headrulewidth}{0pt} % Remove header line
\renewcommand{\seqinsert}{\ifmmode\allowbreak\else\-\fi} % Hyphens in seqsplit
% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
\newcolumntype{x}[1]{>{\raggedright}p{#1}} % New column types for ragged-right paragraph columns
\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
\definecolor{HeadBackground}{HTML}{333333}
\definecolor{FootBackground}{HTML}{666666}
\definecolor{TextColor}{HTML}{333333}
\definecolor{DarkBackground}{HTML}{2150A3}
\definecolor{LightBackground}{HTML}{F1F4F9}
\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{BIO-012 - Metazoa! Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{AlexHoratio (Horatio)} via \textcolor{DarkBackground}{\uline{cheatography.com/21127/cs/24822/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}AlexHoratio (Horatio) \\
  \uline{cheatography.com/horatio} \\
        \uline{\seqsplit{alexhoratiogamedev}.blogspot.com}
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 16th October, 2020.\\
   Updated 16th October, 2020.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{3}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{WHAT ARE METAZOA?}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ac\}\}{\bf{Metazoa}} is literally just another word for 'Animalia', the kingdom of animals. All of them are multi-cellular eukaryotes, and they share some common behaviours.} \tn 
% Row Count 4 (+ 4)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{{\emph{All metazoans...}}}}} \tn 
% Row Count 5 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{~~{\bf{\textgreater{}}} consume organic material (so they are {\emph{heterotrophic}})} \tn 
% Row Count 7 (+ 2)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{~~{\bf{\textgreater{}}} breathe oxygen} \tn 
% Row Count 8 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{~~{\bf{\textgreater{}}} can move} \tn 
% Row Count 9 (+ 1)
% Row 5
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{~~{\bf{\textgreater{}}} can reproduce sexually} \tn 
% Row Count 10 (+ 1)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{~~{\bf{\textgreater{}}} start off from a {\bf{blastula}}} \tn 
% Row Count 11 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{A Nice Diagram of the Metazoa}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{p{5.377cm}}{\vspace{1px}\centerline{\includegraphics[width=5.1cm]{/web/www.cheatography.com/public/uploads/horatio_1602850261_metazoa_evo-diagram.png}}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{THE EUMETAZOA}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{{\bf{How do you know that it's a Eumetazoan?}}} \tn 
\mymulticolumn{1}{x{5.377cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}It's an animal, and it's not a sponge. Thank God.} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{What groups is Eumetazoa split into?}}} \tn 
\mymulticolumn{1}{x{5.377cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Checking the diagram about now would be a good idea.\{\{nl\}\}\{\{nl\}\}{\bf{Eumetazoa}} can be radially symmetrical, at which point you also know that they are {\bf{diploblastic}}.\{\{nl\}\}\{\{nl\}\}If they're not radially symmetrical, then they must be bilaterally symmetrical, and you know that they are {\bf{triploblastic}}.} \tn 
% Row Count 11 (+ 8)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{THE PROTOSTOMES}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{{\bf{Protostomes}} (who develop a {\bf{mouth}} from the blastopore) are actually subdivided {\emph{again}} into either {\bf{Ecdysozoa}}, or {\bf{Lophotrochozoa}}.} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{How do you know it's an Ecdysozoan?}}} \tn 
\mymulticolumn{1}{x{5.377cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}{\bf{Ecdysozoans}} undergo {\emph{ecdysis}}, which is also more commonly known as {\bf{molting}}. This is when they shed their skin in order to grow. They do not exhibit spiral cleavage.} \tn 
% Row Count 8 (+ 5)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{{\bf{How do you know it's a Lophotrochozoan?}}} \tn 
\mymulticolumn{1}{x{5.377cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}{\bf{Lophotrochozoans}} (this clade is also known as\{\{nl\}\}{\bf{Spiralia}}) display a 'spiral' cleavage pattern back in early embryonic development.} \tn 
% Row Count 12 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{THE DEUTEROSTOMES}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{{\bf{Deuterostomes}} (all of which develop an {\bf{anus}} from the blastopore) are nice, because I don't think we have to know exactly how the group sub-divides any further.\{\{nl\}\}\{\{nl\}\}They include all other kinds of animals, such as starfish({\bf{Echinodermata}}) and vertebrates({\bf{Vertebrata}}).} \tn 
% Row Count 6 (+ 6)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{All {\bf{Deuterostomes}} exhibit {\emph{radial}} cleavage.} \tn 
% Row Count 7 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{SPONGES ARE SILLY}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{Sponges are really very strange 'animals'. \{\{nl\}\}\{\{nl\}\}They don't have any kind of symmetry. That is how you know it's a sponge, and that it also doesn't have a proper ectoderm or endoderm!} \tn 
% Row Count 4 (+ 4)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{Consequently, a sponge does {\bf{not}} develop a gastrula, unlike every other kind of animal. For this reason, all other animals are grouped into {\bf{Eumetazoa}}.} \tn 
% Row Count 8 (+ 4)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{{\bf{Optional Disclaimer:}} I looked into it and it turns out that sponge embryos are way more complicated than I thought. So I can't say that they're not dipoblastic, because it does have two germ layers present, but they're not called 'ectoderm' and 'endoderm'. If you want to know, they're called the 'pinnacoderm', the 'choanoderm', and then a weird non-cellular layer of gunk in between those two called the 'mesenchyma'.\{\{nl\}\}\{\{nl\}\}The take-away here is that sponges are weird and {\bf{don't develop a gastrula at all.}}} \tn 
% Row Count 19 (+ 11)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{WHAT ARE DIPLOBLASTS?}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{A {\bf{diploblast}} is an organism that forms two distinct germ layers:} \tn 
\mymulticolumn{1}{x{5.377cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}{\bf{Endoderm:}} This is the inside of the gastrula. It forms the digestive system.\{\{nl\}\}{\bf{Ectoderm:}} This is the outside of the gastrula. This forms the outside of the body, and the 'nervous tissue'.} \tn 
% Row Count 7 (+ 7)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{Examples of diploblastic animals include the {\bf{Cnidaria}} (jellyfish, coral, etc) and the {\bf{Ctenophora}} (rotifers, various other semi-obscure marine invertebrates).} \tn 
% Row Count 11 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{WHAT ARE TRIPLOBLASTS?}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{The {\bf{triploblasts}} are IMO where all the cool animals are. They're all {\bf{bilaterally symmetrical}}, unlike the radially symmetrical diploblasts mentioned above.} \tn 
% Row Count 4 (+ 4)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{How are triploblasts divided into smaller groups?}}} \tn 
\mymulticolumn{1}{x{5.377cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Triploblasts can be either grouped into {\bf{Deuterostomes}} or {\bf{Protostomes}}. This is based on the way that the blastopore is incorporated into the rest of the organism as it grows.\{\{nl\}\}In case you don't remember, the {\bf{blastopore}} is the first 'pore' created during gastrulation, the inside of which is called the {\emph{endoderm}}. \{\{nl\}\}Usually this pore penetrates through the whole organism to create the 'tube' that makes up the digestive system.} \tn 
% Row Count 16 (+ 12)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{{\bf{What is a Protostome?}}} \tn 
\mymulticolumn{1}{x{5.377cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Protostomes are all the species which develop a {\bf{mouth}} out of the blastopore.} \tn 
% Row Count 19 (+ 3)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{What is a Deuterostome?}}} \tn 
\mymulticolumn{1}{x{5.377cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Deuterostomes are all the species which develop an {\bf{anus}} out of the blastopore. This is the one that we {\emph{Homo sapiens}} are a part of.} \tn 
% Row Count 23 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{WHAT IS EMBRYONIC DEVELOPMENT?}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{{\bf{What?}}} \tn 
\mymulticolumn{1}{x{5.377cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Embryonic development is what happens when two sex cells come together to produce a creature. \{\{nl\}\}This is only a very 'generic' overview of the whole process.\{\{nl\}\}Slight variations in certain parts of this process help us to determine what the evolutionary tree for metazoans would look like.} \tn 
% Row Count 8 (+ 8)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{How does it start?}}} \tn 
\mymulticolumn{1}{x{5.377cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}At first, there's just a {\bf{zygote}}. A zygote is a single {\emph{diploid}} cell that has been fertilized and is now ready to start growing into a creature.} \tn 
% Row Count 13 (+ 5)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{{\bf{How does a zygote grow?}}} \tn 
\mymulticolumn{1}{x{5.377cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}The zygote starts off by 'cleaving' itself into more cells through {\bf{mitosis}}. This doesn't make it much bigger just yet, since it's literally just splitting itself into more cells, and not really adding much mass.\{\{nl\}\}\{\{nl\}\}Eventually, the zygote ends up as a ball of several cells, now known as a {\bf{morula}}.} \tn 
% Row Count 21 (+ 8)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{What is blastulation?}}} \tn 
\mymulticolumn{1}{x{5.377cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}The next thing that happens is called {\bf{blastulation}}, which is just when a morula becomes a blastula. This involves creating a hollow space inside the morula known as a {\bf{blastocoel}}.\{\{nl\}\}\{\{nl\}\}At this point, the blastula is only made of a {\bf{single layer}} of cells.} \tn 
% Row Count 28 (+ 7)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{{\bf{What happens next?}}} \tn 
\mymulticolumn{1}{x{5.377cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}A blastula then becomes a {\bf{gastrula}}, which is when some cells move inwards to make a cavity, which will be either the mouth or anus of the growing lil creature.\{\{nl\}\}\{\{nl\}\}At this point, some cells have started to differentiate and become either the {\emph{ectoderm}}(outside), the {\emph{endoderm}}(inside), or the {\emph{mesoderm}}(in the middle). Not all types of animal have all three at this stage!! \{\{nl\}\}\{\{nl\}\}After that, organs start to develop, and it becomes much more specific to the species.} \tn 
% Row Count 40 (+ 12)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}