to join two or more parts together into one.
External Fertilization
Internal Fertilization
When Eggs and Sperm Meet
Have you ever wondered why brothers and sisters look similar but not the same? What decides whether one person has their mother’s nose, or their father’s eyebrows? How come some get male body parts, and others get female body parts? To begin to answer these questions, and understand what happens when sperm and egg meet, we need to learn a little bit about chromosomes.
To Breed or Not to Breed
Sarala Pradhan
Ioulia Bespalova
For many organisms, reproduction is a huge part of life. But what, exactly, does reproduction mean? Well, it can mean so many different things, including breeding or not, caring for young (or not), or giving birth (or not)... read on to learn about the diversity of ways that organisms reproduce.