From 2e7758872ae314f9555b1eccaf016a0a156be6d2 Mon Sep 17 00:00:00 2001
From: Daniel Chen <eggyrules@gmail.com>
Date: Thu, 31 Oct 2019 15:06:12 +0000
Subject: [PATCH] Update Unit 2: Biology.md

---
 Grade 10/Science/SNC2DZ/Unit 2: Biology.md | 31 ++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/Grade 10/Science/SNC2DZ/Unit 2: Biology.md b/Grade 10/Science/SNC2DZ/Unit 2: Biology.md
index 8275c8e..319b657 100644
--- a/Grade 10/Science/SNC2DZ/Unit 2: Biology.md	
+++ b/Grade 10/Science/SNC2DZ/Unit 2: Biology.md	
@@ -147,3 +147,34 @@ A person contains roughly 100 trillion cells
 - Maintains cell shape and resistance
     - Plant cells that lack turgor pressure (e.g., celery left in fridge) become flaccid
 
+## Cell division
+### Purpose
+#### Growth
+ - Cells have maximum size before transportation of substances within cell becomes inefficient
+ - Cells transport chemicals (e.g., nutrients) via `diffusion`
+
+#### Reproduction
+ - Single-cellular organisms reproduce via division asexually
+ - Multicellular organisms reproduce via combining two "sex cells" that contain half the DNA each of two organisms
+    - This is sexual
+
+#### Repair
+ - Cells naturally die and need to be replaced
+    - e.g., red blood cells, hair cells, skin, injuries
+
+### Cell cycle
+ - Interphase
+    - G1
+    - S
+    - G2
+ - Mitosis
+    - Occurs only in eukaryotic cells
+    - Prophase
+    - Prometaphase
+    - Metaphase
+    - Anaphase
+    - Telophase
+ - Cytokinesis
+ - G0
+    - Cell no longer divides
+    - Outisde of cell cycle
\ No newline at end of file