We've all seen pictures of chromosomes, and we know that they contain DNA. But how do we get from the double helix of DNA to the X-looking shape of a chromosome? Is it just DNA, or are there other things in there? How much DNA is in each...

It explains conventional methods of animal breeding and modern biotechnological approaches, which are employed for producing high-yielding animals.

This video provides an overview of dolphins, highlighting their diverse species, social behaviors, communication methods, mating rituals, and parenting habits. It also explores their intelligence, tool usage, and ability to mimic other...

The difference between sex and gender is that sex is a biological concept based on biological characteristics such as difference in genitalia in male and female. Gender on the other hand, primarily deals with personal, societal and...

The nugget explains the structure and functions of organs of male and female system. (Addition - Role of glands, section of testis in male; external genitalia and cervix in females)

SchoolOnline's Secondary Maths videos are brilliant, bite-size tutorial videos delivered by examiners. Ideal for ages 13-17, they cover every key topic and sub topic covered in GCSE Maths in clear and easy to follow...

This video provides a detailed overview of koalas, highlighting their unique physical characteristics, diet, behavior, mating habits, and life cycle. It explains how koalas have adapted to survive on a diet of eucalyptus leaves and...

Join Maddie and Greg as they stop off on their Californian Road trip to see the incredible Piedras Blancas Elephant Seal Rookery!

This video provides a lesson on how to use two-way frequency tables to analyze data and determine if one gender likes math class more than the other. It explains the difference between frequency counts and relative frequencies, and...

We touched upon sexual selection when we learned about natural selection. Essentially when there is a variance in the reproductive success of a particular sex for a given species, secondary sex characteristics will develop in that...

We all know that DNA is the molecule of heredity, but we didn't always know that. It had to be demonstrated empirically. As it happens, some of the first evidence put forth had to do with genes found on the X-chromosome of fruit flies,...

Hormones are chemical messengers secreted by glands and have specific target organs. In this lesson, you will learn about hormones that stimulate changes to your body during puberty. Puberty is the timeframe when secondary sexual...

Jane Margolis is a Senior Researcher at the UCLA Graduate School of Education and Information Studies and the coauthor of Unlocking the Clubhouse: Women in Computing (MIT Press). She was a 2016 White House Champion of Change for her work...

Learn the personal pronouns in Spanish and how to conjugate the verb "tener" (to have).

One of the most consistent features of modern societies is the gendering of crime and criminality. Not only is most crime committed by men, there are also marked differences in the types of crime committed by males and females. Here,...