School of Life Sciences | Ask A Biologist

Why is Rudolp's nose red?

Bone Zoom Gallery

Get up-close inside bones! Take a look at the microscopic world of bone in our virtual bone histology lab.

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In some areas of the world, the weather changes in the fall, making the air turn cold. During this time, many leaves also change colors. Why does this happen?

Question From: Abby
Grade Level: 7

Answered By: Richard K. Simpson
Expert’s Title:
Graduate Student

To learn more about how plants grow, try this link.

Have a different answer or more to add to this one? Send it to us.

Microbes

Ask A Biologist, Coloring Page, Microbes

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Stories and Experiments in Other Languages

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Stories and Activities in Other Languages

With the help of our volunteers we have been able to translate some of our stories and activities into other languages. We continue to grow this section and can always use the help of new volunteers who can help us translate our large collection of content.

Biome Bits

Biome Biology Bits

Biome Bits

By Evan Brus
Illustrated by Sabine Deviche

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  • Conifer: a type of tree or bush that makes cones and evergreen leaves, some of which we call needles.
  • Equator: an imaginary line along the middle of the Earth, going from side to side.
  • Grazing: land used for feeding cattle.
  • Microbe: a living thing so tiny that you would need a microscope to see it... more
  • Migration: movement of an animal or a group of animals from one place to another.
  • Mineral: a non-living substance found in nature that is made of specific and organized elements.
  • Permafrost: soil that remains frozen (below 0˚C/32˚F) for two or more years... more

Flashcard facts and information about biomes

Biology Bits stories are a great way for you to learn about biology a little bit at a time. We’ve broken down information into pieces that are very tiny—bite-sized biology cards. Cutting out the cards will let you organize them however you want, or use them as flashcards while you read.


You can also download Biology Bits in the following formats:

Biology Bits Download Print PDFBiology Bits Download Slideshow PDF
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The Interest of Insects

Humans and insects have more in common than you might think. We share a broad range of similarities, covering everything from muscle and nerve structures to the ways our cells communicate.

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Biology Bits

Biology Bits stories are a great way for you to explore biology a little bit at a time. We’ve broken down information into very tiny—bite-sized pieces perfect for learning.

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Seeing Color Bits

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Seeing Color Bits

By Kimberly Pegram

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  • Photon: the smallest bit of light.
  • Photoreceptor: the special type of cell in your eye that picks up photons and then signals the brain. They are located in the retina (a layer at the back of the eye). There are two types, rods and cones.
  • Prism: a crystal object, such as cut glass, with at least three similar sides... more
  • Retina: getting its name from the Latin meaning "net", the retina is located at the back of the eye and is where light is detected... more
  • Wavelength: a property of photons that determines their energy (how "strong" they are).We see photons of different wavelengths as different colors.

Flashcard facts and information about how we see color

Biology Bits stories are a great way for you to learn about biology a little bit at a time. We’ve broken down information into pieces that are very tiny—bite-sized biology cards. Cutting out the cards will let you organize them however you want, or use them as flashcards while you read.


You can also download Biology Bits in the following formats:

Biology Bits Download Print PDFBiology Bits Download Slideshow PDF
 Print PDF Slideshow PDF

Ant Bits

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Ant Bits

By Ioulia Bespalova
Illustrated by Ioulia Bespalova and Sabine Deviche

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  • Colony: a group of the same kind (species) of plants or animals living together... more
  • Fungus: an organism that is part of the kingdom called fungi which includes yeasts, molds, and mushrooms. Fungi mainly feed on decaying organic matter... more
  • Larva: the second, "worm-like" stage in the life cycle of insects that undergo complete metamorphosis (like caterpillars).
  • Queen: a female ant that lays eggs.
  • Superorganism: a group of organisms in which members depend on each other to complete tasks needed to live. Members are often highly specialized... more

Flashcard facts and information about ants

Biology Bits stories are a great way for you to learn about biology a little bit at a time. We’ve broken down information into pieces that are very tiny—bite-sized biology cards. Cutting out the cards will let you organize them however you want, or use them as flashcards while you read.


You can also download Biology Bits in the following formats:

Biology Bits Download Print PDFBiology Bits Download Slideshow PDF
 Print PDF Slideshow PDF

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