The Bio Brief

What Happens When the Egg Is NOT Fertilised?

Every month: Ovary releases one egg. Uterus prepares for pregnancy But… If no sperm meets the…
Human Reproductive System

Humans reproduce sexually. Two systems are involved: Male Reproductive System Female Reproductive System Male Reproductive System…
Reproduction in Human Beings

1. Mode of Reproduction in Humans Humans reproduce by sexual reproduction. Sexual Reproduction means: 2. Growth…
SEXUAL REPRODUCTION

What is Sexual Reproduction? A single individual cannot produce offspring alone. Why Do Organisms Need Sexual…
MODES OF REPRODUCTION USED BY SINGLE ORGANISMS

(Asexual Reproduction) What is Asexual Reproduction? 1. FISSION Meaning: In unicellular organisms, reproduction occurs by cell…
THE IMPORTANCE OF VARIATION

What Is Variation? Variation means small differences found among individuals of the same species. Example: Organisms…
DO ORGANISMS CREATE EXACT COPIES OF THEMSELVES?

Short Answer: No, organisms do not make exact copies of themselves. They produce similar but not…
HOW DO ORGANISMS REPRODUCE?

Introduction: All living organisms—plants, animals, and even tiny microorganisms—have one important thing in common: they can…
HORMONES IN ANIMALS

What are Hormones? Unlike nerves (electrical signals), hormones: Why are Hormones Needed? Some situations need whole-body…
Movement Due to Growth (in Plants)

What Is Movement Due to Growth? Example 1: Tendrils in Pea Plant What happens when a…