Khan Academy
Khan Academy: Sexual Life Cycles
Tutorial takes a look at the three types of sexual life cycles used by different organisms: diploid-dominant, haploid-dominant, and alternation of generations.
Khan Academy
Khan Academy: Frog Development Examples
How do you build a frog from a single cell? Learn how body axes are established and nerve tissue is induced in frog embryos.
University of Wisconsin
The Why Files: Motherly Reptiles
Explore the idea of live birth in prehistoric reptiles.
Other
Ornithology: Avian Reproduction
Provides a good discussion of the reproductive behaviors and systems of birds. Contains information on everything from nests to incubation times.
CK-12 Foundation
Ck 12: Biology: Bird Reproduction
[Free Registration/Login may be required to access all resource tools.] Describes the reproductive behavior of birds.
CK-12 Foundation
Ck 12: Biology: Reptile Reproduction
[Free Registration/Login may be required to access all resource tools.] Describes reptile reproduction and the amniotic egg.
Cornell Lab of Ornithology
Habitat Network: Habitat Feature: Nesting Materials
Learn that of the best parts of providing habitat for birds in a yard is the possibility of being chosen as a nesting site.
CK-12 Foundation
Ck 12: Life Science: Bird Reproduction
[Free Registration/Login may be required to access all resource tools.] How do birds reproduce? We know that chickens lay eggs. But how do they do that? Learn more about bird reproduction in this learning module produced by CK-12.
CK-12 Foundation
Ck 12: Life Science: Fertilization
[Free Registration/Login may be required to access all resource tools.] The sperm and egg don't look anything like a human baby. After they come together, they will develop into a human being. How does a single cell become a complex...
CK-12 Foundation
Ck 12: Biology: Fish Reproduction and Development
[Free Registration/Login may be required to access all resource tools.] Covers reproduction and development of fish.
CK-12 Foundation
Ck 12: Life Science: Mammal Reproduction
[Free Registration/Login may be required to access all resource tools.] Mammals don't typically lay eggs, but monotremes are the exception. All other mammals give birth to live young and belong to one of two categories, the marsupials...
CK-12 Foundation
Ck 12: Biology: Bird Reproduction
[Free Registration/Login may be required to access all resource tools.] Describes the reproduction behavior of birds.
Texas Instruments
Texas Instruments: From Conception to Birth Time Line
A time line showing the stages of human gestation.
Texas Instruments
Texas Instruments: Amazing Fetal Growth
In this activity you will: graph data of human fetal growth and describe the rate of human fetal growth.
McGraw Hill
Mc Graw Hill: The Reproductive Systems Post Test
Take this five-question quiz over the reproductive system, then after submitting your answers, review the concepts.
BBC
Bbc: Gcse Bitesize: Cell Division
Chromosomes carry genetic information in a molecule called DNA. A type of cell division called mitosis ensures that when a cell divides each new cell produced has the same genetic information. Links to a video and a test are provided.
Sophia Learning
Sophia: Fertilization and Early Development
This lesson will explain the processes involved in fertilization of a female egg. It is 5 of 5 in the series titled "Fertilization."
CK-12 Foundation
Ck 12: Biology: Fertilization to Old Age Study Guide
This comprehensive study guide covers the main terms and concepts needed for a unit on the stages of life beginning at fertilization.
CK-12 Foundation
Ck 12: Life Science: 10.21 Mammal Reproduction
Learn all about mammal reproduction.
CK-12 Foundation
Ck 12: Life Science: 10.17 Bird Reproduction
Learn about the reproduction of birds.
Khan Academy
Khan Academy: Egg Meets Sperm
Although it is happening every hour of every day, all over the world, the story of egg meeting sperm is still a tale worth telling. Millions of candidates set off on a long and perilous journey with a single target at the end, and if the...
CK-12 Foundation
Ck 12: Biology: Mammalian Reproduction Study Guide
Review the reproduction of different types of mammals.
University of Guelph
Canada's Aquatic Environments: Reproduction
A three-page introduction to reproduction in amphibians can be found at this site. Read about the various methods of reproduction, and what happens after the eggs are laid. There is also a section that shows the growth/development stages...
University of Pittsburgh
Univ. Of Pittsburgh/seasonal Decline in Tree Sparrow
A HIGH level science article written about the change in clutch size through a mating season and the possible science base for this phenomena.