Search Results

Search Results

Refine this search

2,120 results

Image

from article Biofilm

Result thumbnail
Biofilms are highly structured communities of microorganisms that are surface-associated or attached to one another, and are enclosed within a self-produced protective extracellular matrix. Biofilm formation and actions involve a number of stages:…

Image

from article Animal testing

Result thumbnail
Mice are the most commonly used vertebrate species in animal testing and research. (Credit: Dolores Bonaparte)

Image

from article Animal testing

Result thumbnail
The use of animals in biomedical research remains essential, but the handling of these sentient beings must be done humanely to minimize and prevent animal harm. (Credit: U.S. Department of Agriculture)

Image

from article Anthrax

Result thumbnail
A color-enhanced scanning electron micrograph showing splenic tissue from a monkey with inhalation anthrax. Rod-shaped bacilli of Bacillus anthracis (yellow) and an erythrocyte (red) are shown. (Credit: Arthur Friedlander/National Institute of…

Image

from article Anthrax

Result thumbnail
Micrograph (stained with hematoxylin and eosin) showing submucosal hemorrhage in the small intestine of a person fatally affected by gastrointestinal anthrax. (Credit: Marshal Fox/Centers for Disease Control and Prevention)

Image

from article Ecosystem

Result thumbnail
Levels of organization in ecosystems, which involve both biotic (living) components and abiotic (nonliving, physical) components. (Copyright © McGraw-Hill Education)

Image

from article Ecosystem

Result thumbnail
General model of energy flow through ecosystems. (Copyright © McGraw-Hill Education)

Image

from article Ecosystem

Result thumbnail
Food chains are limited by energy transfer. In this illustration, energy is transferred from the Sun to a plant (producer) to a primary consumer and to a secondary consumer. Energy is used by the producer and consumer organisms and is lost to the…

Image

from article Ecosystem

Result thumbnail
General model of the nitrogen cycle in ecosystems. (Copyright © McGraw-Hill Education)

Image

from article Ecosystem

Result thumbnail
General model of the carbon cycle in ecosystems: (A) carbon dioxide (CO2) from the air; (B) carbon from decomposition; (C) carbon from fossil fuels; (D) natural events (for example, forest fires and volcanoes) release CO2 into the air. (Copyright ©…

Learn more about AccessScience

a female college student looking at the screen of her silver-cased laptop computer
Watch the YouTube video

flyer thumbnail

Download the flyerGet Adobe Acrobat Reader pdf icon