Why do we have different cells in our bodies if every cell has the same DNA?
The genome of a cell contains in its DNA sequence the information to make many thousands of different protein and RNA molecules. A cell typically expresses only a fraction of its genes, and the different types of cells in multicellular organisms arise because different sets of genes are expressed.
For this experiment, the biology student needs to know the relationship between the amount of sunlight a mice receives and its length of sleep. The data to be collected are the independent variable which would be varied, the amount of sunlight, and the dependent variable, the length of sleep for mice.
Answer:
See the answer below
Explanation:
<em>Hypothermia is a condition in which the body of an individual experiences abnormally low temperature while hyperthermia is a direct opposite, that is, a condition in which the body of an individual experience abnormally high temeprature.</em>
<u>In hypothermia, the body loses heat at a faster rate than it is producing, resulting in a net temperature loss and abnormally low body temperature. Whereas, in hyperthermia, the body gains heat at a faster rate than it loses to the environment which results in abnormally high body temeprature.</u>
The body naturally tries to deal with hypothermal by <u>sending merve impulses to muscles.</u> By doing so, the muscles of the body begin to vibrate in order to generate extra heat to keep the body at normal temperature. In addition, <u>the blood vessels that transport blood to the skin also experiences vasoconstriction</u>, they reduction in the diameter to limit blood flow to the skin in order to limit heat loss. Instead, the flow of warm blood to internal organs is increased in order to compesate for the drop in body temperature.
Hyperthermia is dealt with by <u>increasing blood flow to the skin through vasodilation of the blood vessels responsible for carrying blood to the skin</u>. The increased blood supply leads to more sweat emanating from the skin whose evaporation causes cooling of the skin. By so doing, the body temeprature can be brought back to the normal level.
Inheritance Example
With respect to eye color, the allele for brown eyes (B) is dominant, and the allele for blue eyes (b) is recessive. If a person receives dominant alleles from both parents (BB) she will have brown eyes. ... But if she receives recessive alleles from both parents (bb), she will have blue eyes.
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Answer:
It helps the sea turtles to survive because there are seagulls and other predators at the beach, so they will eat at least some of the baby turtles. But, when there are a large amount, the predators will be distracted with another baby turtle and hopefully at least some will make it to the ocean.