Josh notices that the frog he is dissecting has many different types of tissues and cells. The cells are different due to different gene expression. The term differential gene expression denotes the activation of different genes within a cell. Each cell expresses only those genes which it needs.
Digestive System
Endocrine System
Excretory
Integumentary System
Muscular System
Nervous System
Reproductive System
Respiratory System
Skeletal System
B)sleep habits
C) climate
D)poverty
Sleep habits is a controllable risk factors for disease. Taking less sleep than normal can lead to disease. Thus, the correct option is B.
Factors which could lead to disease are of two main types which are controllable and uncontrollable. A controllable factor for disease riskcan alter or influence if a person wish to do so or can control a disease set by changing these factors.
An uncontrollable factor is the one which a person cannot easily alter by choice. If a person depend on the teacher for success or if a person compete with their peers for the few available high grades, he explain his situation by pointing to the uncontrollable factors.
Some examples of controllable risk factors for disease are sleeping habits, poor diet, and nutrition, physical inactivity, spending too much time in the sun or in front of the screen, and not having certain vaccinations.
Therefore, the correct option is B.
Learn more about Disease factors here:
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