Answer:
Regulate heat throughout it's body,
Explanation:
Countercurrent Heat Exchange is a normal and varied mechanism in organisms that utilizes parallel pipes of flowing fluid in opposite directions in order to save energy, such as blood flow. For example, a whale's tongue uses this system through the blood flow to the tip of the tongue, where the countercurrent heat exchange system heats up blood returning to the body.
Answer: The answer is mutation and natural selection
Explanation:
When members of a population interbreed (marry one another), genes are recombined and spread in the entire population resulting in gene flow. However, the Dunkers family decision not to intermarry would prevent gene flow, rather favor the NATURAL SELECTION of some genes, making the DUNKERS family genetically unique from the remaining population
Root growth from the seed growing downwards to provide more sub roots then they grow into a hair like substance it remains attached as the stem is growing up and then it breaks the soil and develops leaves.
Answer.Nucleotides Have Characteristic Bases and Pentose. Nucleotides have three characteristic components: (1) a nitrogenous base, (2) a pentose, and (3) a phosphate (Fig. ... The nitrogenous bases are derivatives of two parent compounds, pyrimidine and purine (Fig. 12-lb).