search the articles directory
old Nature sciences articles
The Digestive System - ... extracellular
digestion and then absorbed by individual cells.
During digestion, four different groups of molecules are commonly encou...
The Respiratory System - ...he process of
producing ATP within the mitochondria of cells.) The following gas exchange mechanisms are
found in animals:
1. Dire...
The Endocrine System - ... of hormones can have significant influence on target cells.
3. Hormones may be steroids, peptides, or modified amino acids.
Through the...
The Immune System - ...us membranes provide a nonspecific first line of defense against invaders
entering through the skin or through openings into the body...
The Nervous System - ...>is typically a long, slender extension of the cell body that sends nerve impulses.
A nerve impulse begins at the tips of the dendrite bran...
Thermoregulation - ...ans,
reptiles, and fish. Because many of these animals may feel cold to the touch they
are called “cold-blooded” animals, but many...
Animal Movement - ...• When a log or rock is lifted, animals will suddenly scurry about. These movements
are kineses in response to light, touch, air tempera...
Transport of Sugars - ...be members by
active transport. This develops a concentration of solutes (dissolved substances, sugars in
this case) in the sieve-tube membe...
Kinds of Animal Behavior - ...e original intent of the behavior can no longer be fulfilled.
• When a graylag goose sees an egg outside her nest, she will methodically...
Embryonic Development - ... expects you to know features of only the first two developmental stages, gametogenesis
and embryonic development. Gametogenesis was previously ...
Ecological Succession - ... all living organisms) increase. Eventually, a final successional stage of constant species
composition, called the climax community, is a...
The Muscular System - ... the muscle cell, contains calcium-storing sarcoplasmic
reticulum, the specialized endoplasmic reticulum of a muscle cell.
...
Human Population Growth - ...to one of agriculture. In the last hundred years,
food output from agriculture was increased as a result of technological advances made
durin...
Transport of Water - ...ells.
2. Water moves from one cell to another through the symplast, or “living” portion of cells.
In this path...
Biogeochemical Cycles - ...
to the environment (release).
1. Hydrologic cycle (water cycle).
• Reservoirs: oceans, air (as water ...
Biomes - ... characterized by high temperature and heavy rainfall. The vegetation
consists predominately of tall trees that branch only at their tops, formin...
Life of Rocks - ... ice and gravity.
Weathering are of two types:
Mechanical or Physical Weathering.
By physical weathering, rocks are mechanic...
Human Impact on the Biosphere - ... fuels and forests increases CO2 in the atmosphere.
Increases in CO2 cause more heat to be trapped in the earth’s atmosphere. As a result,
...
Where are the Bees Going - ...exas, they have seen a fall of numbers up to a rate of 60%. California has seen bee colonies drop off from 30 to 60 %, plants depend on bees to polli...
latest articles under "Nature sciences"
Navigation: Categories » Education and reference » Nature sciences
Below is a list of all Nature sciences articles. If you want to find a tutorial by keywords, all you have to do is a quick search in our directory. Just use the search option. The website search is powered by Google. But, if you want to read specific Nature sciences tutorial, just point to it. The newest articles and tutorials are shown first in the list. To access the last ones, browse the pages 2, 3, 4... at the bottom.
Page# 1 (last added articles shown first)
Enter page# 1 (last added articles shown first)
Below is a list of all Nature sciences articles. If you want to find a tutorial by keywords, all you have to do is a quick search in our directory. Just use the search option. The website search is powered by Google. But, if you want to read specific Nature sciences tutorial, just point to it. The newest articles and tutorials are shown first in the list. To access the last ones, browse the pages 2, 3, 4... at the bottom.
Page# 1 (last added articles shown first)
Where are the Bees Going (02/26/2008)
... In Europe, they are not finding the bees dead in the hives...
... In Europe, they are not finding the bees dead in the hives...
Transport of Water (10/29/2007)
... The apoplast pathway is blocked by the suberin that permeates the casparian strip...
... The apoplast pathway is blocked by the suberin that permeates the casparian strip...
Ecological Succession (10/23/2007)
... Over shorter periods of time, succession occurs because species that make up communities alter the habitat by their presence...
... Over shorter periods of time, succession occurs because species that make up communities alter the habitat by their presence...
The Muscular System (10/23/2007)
... Nearly the entire volume of the muscle cell is filled with numerous, long myofibrils...
... Nearly the entire volume of the muscle cell is filled with numerous, long myofibrils...
Embryonic Development (10/16/2007)
... Like other larvae, the pluteus undergoes additional development (metamorphosis) that transforms the larva into an adult...
... Like other larvae, the pluteus undergoes additional development (metamorphosis) that transforms the larva into an adult...
Kinds of Animal Behavior (10/10/2007)
... However, she will also retrieve any object that resembles her egg, and once the FAP has begun, she will continue the retrieval motions until she has completed the motions back to the nest...
... However, she will also retrieve any object that resembles her egg, and once the FAP has begun, she will continue the retrieval motions until she has completed the motions back to the nest...
The Nervous System (10/04/2007)
... Sensory neurons (or afferent neurons) receive the initial stimulus...
... Sensory neurons (or afferent neurons) receive the initial stimulus...
The Immune System (10/03/2007)
... Antimicrobial proteins (such as lysozyme, which breaks down the cell walls of bacteria) are contained in saliva, tears, and other secretions found on mucus membranes...
... Antimicrobial proteins (such as lysozyme, which breaks down the cell walls of bacteria) are contained in saliva, tears, and other secretions found on mucus membranes...
The Endocrine System (10/02/2007)
... As the master integrator of information, the brain may determine that some kind of action is necessary to maintain homeostasis or that conditions are appropriate to activate developmental changes...
... As the master integrator of information, the brain may determine that some kind of action is necessary to maintain homeostasis or that conditions are appropriate to activate developmental changes...
Enter page# 1 (last added articles shown first)