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Bài viết của Nguyễn Mỹ Hương

Development of Force Concept

Dynamics is the study of the forces that cause objects and systems to move. To understand this, we need a working definition of force. Our intuitive definition of force —that is, a push or a pull—is a good place to start. We know that a push or pull ...

Tác giả: Nguyễn Mỹ Hương viết 15:26 ngày 25/05/2018 chỉnh sửa

DC Voltmeters and Ammeters

Voltmeters measure voltage, whereas ammeters measure current. Some of the meters in automobile dashboards, digital cameras, cell phones, and tuner-amplifiers are voltmeters or ammeters. (See [link].) The internal construction of the simplest of these meters ...

Tác giả: Nguyễn Mỹ Hương viết 15:26 ngày 25/05/2018 chỉnh sửa

Population Demographics and Dynamics

Populations are dynamic entities. Their size and composition fluctuate in response to numerous factors, including seasonal and yearly changes in the environment, natural disasters such as forest fires and volcanic eruptions, and competition for resources ...

Tác giả: Nguyễn Mỹ Hương viết 15:26 ngày 25/05/2018 chỉnh sửa

Errors in Meiosis

Inherited disorders can arise when chromosomes behave abnormally during meiosis. Chromosome disorders can be divided into two categories: abnormalities in chromosome number and chromosome structural rearrangements. Because even small segments of chromosomes can ...

Tác giả: Nguyễn Mỹ Hương viết 15:26 ngày 25/05/2018 chỉnh sửa

Organogenesis and Vertebrate Formation

Gastrulation leads to the formation of the three germ layers that give rise, during further development, to the different organs in the animal body. This process is called organogenesis . Organogenesis is characterized by rapid and precise movements of the ...

Tác giả: Nguyễn Mỹ Hương viết 15:25 ngày 25/05/2018 chỉnh sửa

Comparing Prokaryotic and Eukaryotic Cells

Cells fall into one of two broad categories: prokaryotic and eukaryotic. The predominantly single-celled organisms of the domains Bacteria and Archaea are classified as prokaryotes ( pro - = before; - karyon - = nucleus). Animal cells, plant cells, fungi, and ...

Tác giả: Nguyễn Mỹ Hương viết 15:25 ngày 25/05/2018 chỉnh sửa

Organizing Life on Earth

All life on Earth evolved from a common ancestor. Biologists map how organisms are related by constructing phylogenetic trees. In other words, a “tree of life” can be constructed to illustrate when different organisms evolved and to show the ...

Tác giả: Nguyễn Mỹ Hương viết 15:25 ngày 25/05/2018 chỉnh sửa

Axial Muscles of the Head, Neck, and Back

The skeletal muscles are divided into axial (muscles of the trunk and head) and appendicular (muscles of the arms and legs) categories. This system reflects the bones of the skeleton system, which are also arranged in this manner. The axial muscles are ...

Tác giả: Nguyễn Mỹ Hương viết 15:25 ngày 25/05/2018 chỉnh sửa

Mapping Genomes

Genomics is the study of entire genomes, including the complete set of genes, their nucleotide sequence and organization, and their interactions within a species and with other species. Genome mapping is the process of finding the locations of genes on each ...

Tác giả: Nguyễn Mỹ Hương viết 15:25 ngày 25/05/2018 chỉnh sửa

Theoretical Perspectives on Global Stratification

As with any social issue, global or otherwise, there are a variety of theories that scholars develop to study the topic. The two most widely applied perspectives on global stratification are modernization theory and dependency ...

Tác giả: Nguyễn Mỹ Hương viết 15:24 ngày 25/05/2018 chỉnh sửa