I don’t understand the question but if I can make a correct inference, they have thorns to protect themselves from predators.
Answer: Temperature control
Explanation:
Arterio-venous anastomoses (AVAs) are direct connections between small arteries and small veins. In humans they are numerous in the glabrous skin of the hands and feet.
They are very significant in body temperature control. These temperature control are under the dual control of the central nervous system and the local thermal influence. While the arteriovenous anastomoses control the skin temperature through volume changes in the superficial venous bed, the arterioles and capillaries operate by generalized dilatation which results both in increased temperature and in redness of the skin.
Answer:
The life process may be defined as the different process that are important for the sustenance of life. The most important life process are nutrition, respiration, excretion and transportation.
If the mouse is placed in the closed sealed container then the weight will remain before and after the experiment of 1 or 2 week. This is because the life process metabolic reactions will use and conserve all the atoms involved in the life process. These atoms can exist in the liquid, solid and gas forms but present inside the container.
DNA is made up of deoxyribose sugar while mRNa is made up of ribose sugar. DNA has thymine as one of the two pyrimidines while mRNA has uracil as its pyrimidines base. DNA is present in the nucleus while mRNA diffuses into the cytoplasm after synthesis. DNA is double stranded while mRNA is single stranded.
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