Why would few reptiles be found in the tundra?
What will be an ideal response?
Reptiles are cold-blooded and need a certain amount of sunlight and above-freezing temperatures to complete their life cycles. They also do not have much in the way of insulation on their bodies. The climatic features of the tundra, including freezing temperatures, dry winds, and frozen ponds and soils, are not conducive to the survival of most types of reptiles. It would also be a tough place to bury eggs.
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PCR is useful for amplifying a particular section of DNA
Indicate whether this statement is true or false.
Structural genes code for
A. cellular proteins. B. transfer RNA molecules. C. gene expression elements. D. ribosomal RNA molecules.
If the death rate of a population exceeds the birth rate of a population, ____
a. the growth rate will remain static b. the population will grow c. the environment will become overexploited d. an exponential growth curve will result e. the population will decrease in size
All of the following hormones are secreted by organs of the digestive system and directly regulate digestive processes EXCEPT ________.
Fill in the blank(s) with the appropriate word(s).