Biology

This overview of eukaryotic cell structure is intended to provide an introduction to the main sub-cellular organelles as a starting point for further study.

Jan 26, 2012 - Vicki Dennison

The unique nature of haemoglobin, together with the advent of complex circulatory systems, has allowed terrestrial vertebrates to optimise oxygen uptake.

Sep 21, 2011 - Zoe Bianchi

New insights from a study of aging in birds suggest that endurance training combined with a low calorie, high nutrition diet, may extend a human's lifespan.

Sep 6, 2011 - Suzan Phillips

The platypus, once thought to have evolved after marsupials and placentals, is now generally agreed to belong to the most primitive mammalian order.

Sep 4, 2011 - Zoe Bianchi

The latest trend in primate classification has been to classify in a manner that best reflects evolution, geography and physical and biochemical factors.

Jul 29, 2011 - Zoe Bianchi

With the decline of bees in the United States, the Great Sunflower Project enlists individuals to tally bees on specific flowers in their gardens.

May 10, 2011 - Helga George

Since plants cannot move to avoid attack, they have evolved a wide array of both inducible and constitutive chemicals to defend themselves.

Apr 5, 2011 - Helga George

Local farmers can grow organic food far from industrial pollution but the apple snail threatens the future of Hawaii symbolic plant and put visitors at risk

Apr 2, 2011 - Marie-Claude Arnott

Efficient cellular functioning is due to a high surface area to small volume relationship. This principle applies to all cells in all living organisms.

Mar 16, 2011 - Mike Brandolino

Here are practice multiple-choice test questions appropriate for use on a quiz or exam in a high school biology or college introductory cell biology class.

Feb 25, 2011 - Tami Port

The cells of plants are eukaryotic, with a nucleus, a vacuole, membrane-bound organelles and a cell wall. Here's a summary of their structure and function.

Dec 1, 2010 - Tami Port

The Sleeping Bear Dunes National Lakeshore is an ever-changing example of ecological succession, particularly secondary succession.

Nov 16, 2010 - Diane Ursu

Biology jobs comprise several scientific disciplines that contribute information on the different levels of organization to more fully understand life.

Nov 3, 2010 - Diane Ursu

The autumn season brings a change in the weather, foliage becomes bright, and holidays such as Halloween and Thanksgiving are found in North America.

Oct 18, 2010 - Paula I. Nielson

Cellular respiration facilitates ATP production to fuel cell processes. It includes glycolysis, the citric acid cycle, and oxidative phosphorylation.

Oct 12, 2010 - Diane Ursu

Flowering plants are monocots or dicots based on the number of cotyledons produced when a seed sprouts. Other characteristics are used for identification.

Oct 12, 2010 - Diane Ursu

Carnivorous plants, also called insectivorous plants, are plants that eat animals. They include the pitcher plant, the Venus flytrap, and the sundew.

Oct 12, 2010 - Diane Ursu

Parasitism began billions of years ago and gave rise to complex life on Earth. The parasitic lifestyle is common and efficient.

Sep 3, 2010 - Rosemary Drisdelle

Lawmakers from the state of Ohio experienced a day of hands-on participation at one of Ohio's premier research facilities: Stone Laboratory at Lake Erie.

Jul 17, 2010 - Brenda Layman

A live Asian carp was found near Lake Michigan on June 22, 2010. Is it too late to keep Asian carp out of the Great Lakes? Will the Chicago locks be closed?

Jun 24, 2010 - Diane Ursu

After an episode of chickenpox, the varicella-zoster virus lies dormant in nerves and may later develop into shingles (herpes zoster).

Jun 23, 2010 - Diane Ursu

Pigmentation is an adaptation to the presence of UV light that contributes to reproductive success by influencing folate and vitamin D3 levels in the body.

Jun 22, 2010 - Diane Ursu

Skin pigmentation is a response to the body's need for vitamin D3 production and protection from UV light. It is an adaptation to the environment.

Jun 22, 2010 - Diane Ursu

Yawning and spider web formation are examples of innate behaviors called fixed action patterns. Once initiated, fixed action patterns cannot be interrupted.

Jun 19, 2010 - Diane Ursu

A new technique reveals the unusual diffracting cells that produce the iridescent hues of butterfly wings.

Jun 14, 2010 - Jenny Ashford

Biology concepts and connections are often presented in lists and units, but biology students may struggle when critical thinking is not developed.

Jun 12, 2010 - Diane Ursu

A new study finds that people tend to feel the pain of others of the same race more than those of different races.

May 27, 2010 - Jenny Ashford

Muscle activity, blood pH, and body temperature affect heart rate and breathing rate. These processes work together to maintain the body's normal state.

May 26, 2010 - Diane Ursu

The presence of a cell nucleus is the difference between eukaryotic and prokaryotic cells. Eukaryotic DNA is also copied into RNA for gene expression.

May 7, 2010 - Diane Ursu

The bacteriophage virus structure allows it to invade bacteria for virus reproduction. New bacteriophages are released by cell lysis due to osmosis.

May 7, 2010 - Diane Ursu

Taxonomic classification is an important part of phylogenetic systematics. It begins with the three domains of life and becomes much more specific.

May 1, 2010 - Diane Ursu

Taxonomic classification illustrates the relationships between all life. It begins with the three domains of life and four kingdoms.

May 1, 2010 - Diane Ursu

An organism's taxonomic classification as Archaea, Bacteria or Eukarya depends on cell structure and genetic material.

Apr 28, 2010 - Diane Ursu

Single, prokaryotic cells comprise archaea. Archaean cell walls contain L-glycerol isomers, which differ from those of bacteria and eukaryotes.

Apr 27, 2010 - Diane Ursu

Bacteria are single, prokaryotic cells. They are different from archaea in that peptidoglycan is a major component in the bacterial cell wall.

Apr 27, 2010 - Diane Ursu

Yeast is used for making beer, wine and bread in the form of brewer's yeast and baking yeast. This fungus also causes yeast infections such as oral thrush.

Apr 11, 2010 - Diane Ursu

Downy feathers, underfur, countercurrent heat transfer, and behavioral modifications are some of the impressive mechanisms helping keep animals warm during the winter.

Feb 15, 2010 - Albert Burchsted

Prairies evolved with the presence of fire and herbivores, with their existence dependent upon their presence. In fact, prairies cannot exist without these disturbances.

Jan 27, 2010 - Chris Dinesen Rogers

A newly-introduced species may change an ecosystem by becoming an invasive species that alters the food supply and habitat, leading to diminished native populations.

Jan 27, 2010 - Diane Ursu

Sexual reproduction allows for natural selection and genetic diversity which increase the likelihood that progeny may not receive harmful genetic mutations.

Jan 26, 2010 - Diane Ursu

If Sir Joseph Banks were to visit a suburban nursery today, would he appreciate the wide range of hybrid plants that have been derived from those he originally collected?

Jan 25, 2010 - Zoe Bianchi

Feeding on the blood of living creatures makes these vampires the perfect subjects for horror novels. These little suckers can fly and attack in the dark of night.

Jan 24, 2010 - Harvey Craft