Skip to Main Page Content
Learn more about ASU for You
Search
Report an accessibility problem
Menu
Sign In / Sign Out
Sign In
Navigation for Entire University
ASU Home
News/Events
Academics
Research
Athletics
Alumni
Giving
President
About ASU
My ASU
Colleges and Schools
Arts and Sciences
Business
Design and the Arts
Education
Engineering
Global Futures
Graduate
Health Solutions
Honors
Journalism
Law
Nursing and Health Innovation
Public Service and Community Solutions
University College
Thunderbird School of Global Management
Map and Locations
Map
Tempe
West
Polytechnic
Downtown Phoenix
Online and Extended
Lake Havasu
SkySong
Research Park
Washington D.C.
China
Directory
Search
Ask A Biologist
Home
Activities
Biology Bits
Bird Finder
Body Depot
Coloring Pages
Experiments and Activities
Games and Simulations
How To
Puzzles
Quizzes
Quizzes in Other Languages
Virtual Reality (VR)
Stories
World of Biology
Meet Our Biologists
Listen and Watch
PLOSable Biology
Embryo Tales
All About Autism
Xs and Ys: How Our Sex Is Decided
When Blood Types Shouldn’t Mix: Rh and Pregnancy
What Is the Menstrual Cycle?
Understanding Intersex
Twin Tales
The Mysterious Case of the Missing Periods
Summarizing Sex Traits
Shedding Light on Endometriosis
Periods: What Should You Expect?
Menstruation Matters
Investigating In Vitro Fertilization
Introducing the IUD
How Fast Do Embryos Grow?
Helpful Sex Hormones
Getting to Know the Germ Layers
Gender versus Biological Sex: What’s the Difference?
Gender Identities and Expression
Focusing on Female Infertility
Fetal Alcohol Syndrome and Pregnancy
Ectopic Pregnancy: An Unexpected Path
Creating Chimeras
Confronting Human Chimerism
Cells, Frozen in Time
EvMed Edits
Stories in Other Languages
Images
Virtual Reality
Zoom Gallery
Ugly Bug Galleries
Links
Contact
Ask a Question
Top Questions
Question Guidelines
Feedback
Permissions
Information Collected
Author and Artist Notes
Volunteer
About
Credits
Share Ask A Biologist
Donate
Articles & News
Awards
Our Volunteers
Teacher Toolbox
My results
View
My results
(active tab)
Take
Ask A Question
Teacher's Toolbox
Listen and Watch
Date started
Date finished
Score
Operations
Aug 29 2022 - 3:27am
Aug 29 2022 - 3:29am
63
View
Oct 2 2022 - 8:26am
Oct 2 2022 - 8:28am
75
View
Oct 2 2022 - 8:31am
Oct 2 2022 - 8:33am
100
View
