The lecturer describes how specific characteristics develop. In this case, he discusses eye marking. The impact of environmental factors significantly influences the likelihood of successful reproduction, as favorable genes are more...

The female body is an amazing thing. This short video explains the amazing cycle that has developed to ensure the continuation of life. Did you know that only monkeys, apes, bats, humans, and maybe elephant shrews menstruate? 

Humans, through artificial selection, created a dog that is hypoallergenic, loves water, is good with kids, very smart, and comes in a variety of colors — a labradoodle. Through the analysis of dog breeds, class members explore...

Leukemia afflicts children more than any other type of cancer. Pupils explore the nature of harmful mutations in cell DNA, the reproduction of damaged cells in blood and bone marrow, and their effect on normal functions of the human...

Have you ever wondered why calico cats have such a colorful coat? The process of X inactivation is an interesting phenomenon in females that drives the physical appearance of individuals. Viewers of an intriguing video connect knowledge...

Could Disney be tricking people into caring about their characters? It seems the design of characters in recent years triggers our nurturing instincts. A video explains the science behind these instinctual habits—and why viewers are...

If there are no extenuating environmental factors to ensure competition in a species, then variation is achieved by random mutation. This resource may be more useful after viewers are introduced to the concepts of alleles and the...

The evidence for natural selection is presented as a random variation of a characteristic allowing a particular strain of organism to survive with a higher probability of successful reproduction. Population change over a short period is...

A short video offers a simple, yet engaging, explanation of the theory of evolution using amoebas as an example. The narrator uses the example of the evolution of dog breeds as an example of how humans can influence the course of change.

Would you rather having biting flies or chocolate? The question may seem absurd, but cocoa trees rely on pollination from biting flies. Viewers come to understand the importance of pollinators to our food supply, flowers, and entire...

One cloning technique is somatic cell nuclear transfer (SCNT). Observe the process in action through an animated video. Review the applications of the process for both therapeutic cloning and cloning of an individual.

Understand the structure and function of the reproductive system. [6:38]

Overview of fertilization and early human development, from conception leading to a zygote to blastocyst, embryo and fetus. [7:59]

Learn about the structure and function of egg and sperm fertilization. [11:35]

There are three major types of hormones. 1) Protein hormones (or polypeptide hormones) are made of chains of amino acids. An example is ADH (antidiuretic hormone) which decreases blood pressure. 2) Steroid hormones are derived from...

In this video tutorial, you will learn how a zygote, the single cell produced by fertilization, divides by mitosis to produce all the tissues of the human body. [9:35]