What is the main difference between physiological adaptation (as in sense, respond and adapt to the environment) and evolutionary adaptation? Evolutionary adaptation occurs over generations. Evolutionary adaptation does involve genetic change but it’s the change in traits as a result of genetic change that drives natural selection and evolutionary adaptation (just genetic change alone won’t drive evolutionary change). Physiological adaptation is an adjustment to environmental stress.
Provide one example of physiological adaptation and one example of evolutionary adaptation (can be for any organism, including humans):
- Physiological adaptation: Examples of psychological adaptations in a human is :acclimated to adjust to environmental change in weather cold, hot and high altitudes without genetic change long-term acclamations when people lose excess body fat and are very slender for long periods of time a result of mild long-term undernourishment they will retain more body fat eventually becoming obese. They experience this when they initially lose body fat and again gain later when they retain it Tanning is a seasonal adaptation.
- Evolutionary adaptation: Eyes in front of head in humans instead of on side of head like other mammals.
In comparison, why is the nucleus of our cheek cells so small? (please be specific). The nucleus controls the activity of the cell. The cell Membrane surrounds the nucleus of the cheek. cytoplasma in that nucleus bacteria smaller and compares you see them as small dark spots
The cell membrane delineates the cell, helps the cell sense its outside environment, identifies the cell to other cells, and “talks” to other cells. Cell membrane proteins can be integral (within the membrane), or peripheral (adjacent to membrane).
Some integral membrane proteins span the entire membrane; these are called transmembrane proteins. An example, receptor proteins help the cell sense and receive information from its outside environment. Signal transduction proteins transmit signals across its membrane and communicate with other cells. These proteins can also function transport of substances across membranes, cell-to-cell communication, and cell identification.
The membrane proteins and cholesterol, which contribute to cell membrane structure and function. Transport proteins (e. g. , channel proteins) help substances (e. g. glucose & salts) to cross the cell membrane. Glycoproteins (protein-sugar molecules) on the cell surface identify the cell. Peripheral proteins usually have an enzymatic function (carry out signaling, biosynthesis or breakdown reactions). Sickle cell anemia is a genetic disease with severe symptoms, including pain and anemia.
The disease is caused by a mutated version of the gene that helps make hemoglobin — a protein that carries oxygen in red blood cells. The mutations that cause sickle cell anemia can be traced from the DNA level up to the level of the whole organism. Someone carrying only one copy of the gene.
She does not have the disease, but the gene that she carries still affects her, her cells, and her proteins: The mutation in the DNA slightly changes the shape of the hemoglobin molecule, allowing it to clump together. There are effects at Cellular level: When red blood cells carrying mutant hemoglobin are deprived of oxygen, they become “sickle-shaped” instead of the usual round shape. This shape can sometimes interrupt blood flow. There are negative effects at the whole organism level: Under conditions such as high elevation and intense exercise, a carrier of the sickle cell allele may occasionally show symptoms such as pain and fatigue.
