Mr. Sexton's Science Outpost

Nature is worth knowing.

Tag: biology

related to the study of life

This Wasp Kills Black Widow spiders!

The Blue Mud dauber preys upon Black Widow spiders. Nice! http://en.wikipedia.org/wiki/Blue_mud_dauber

The Blue Mud dauber preys upon Black Widow spiders. Nice!

This is the second metallic green insect that I have found in my backyard over the last few days.  Chalybion californicum is the scientific name of the Blue Mud Dauber. I was lucky to snap a shot of it because they are lightning fast! They range in darkness and in color from blue to green.

Chalybion californicum

Chalybion californicum

Not only do Blue Mud Daubers prey upon Black Widow spiders, but this beauty was kind enough to pause briefly for a photo.  Come back any time little buddy!

 

 

 

 

 

 

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Cartoon drawing of Mr. Sexton feverishly writing notes with a test-tube of purple liquid in one hand, and a chalkboard full of equations in the background.

 

 

 

 

 

 

Updated: February 2, 2015 — 3:15 pm

Match the Molecule

Here are images (DON’T READ THE CAPTIONS YET!) of three important biological macromolecules.

One of them is a nucleic acid.

One of them is a protein (the most abundant protein on Earth!).

One of them is a little bit of both, a ribonucleoprotein.

Can you guess which one is which before you read the captions?

Protein ribbon structure of Rubisco

Rubisco is the nickname of the protein Ribulose-1,5-bisphosphate carboxylase oxygenase

Over the course of evolutionary time, regions of the ribosome in different species have been added while conserving the functional core.

Over the course of evolutionary time, regions of the ribosome in different species have been added while conserving the functional core.

The molecular structure of DNA is like a twisted ladder.

The double helix structure of deoxyribonucleic acid, or DNA, is like a twisted ladder where the sides of the ladder are composed of sugar and phosphate units linked by covalent bonds, and the rungs of the ladder are made of the four nitrogenous bases linked by hydrogen bonds.

Study Reveals Evolution of the Ribosome in New Detail

What good is DNA without a ribosome?  Considering how the ribosome has changed over the last 4 billion years gives insight to the crucial nature of its role in biology, the unity of all life, and the process of evolution.

http://www.sciencedaily.com/releases/2014/06/140630164012.htm

In the new study, Williams and Research Scientist Anton Petrov compared three-dimensional structures of ribosomes from a variety of species of varying biological complexity, including humans, yeast, bacteria and archaea. The researchers found distinct fingerprints in the ribosomes where new structures were added to the ribosomal surface without altering the pre-existing ribosomal core from the last universal common ancestor.140630164012-large

For a video on the origins and evolution of the ribosome, visit:https://www.youtube.com/watch?v=ei6qGLBTsKM

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