An elephant’s trunk does not have any bones. However, it has many muscles, and the tip has

very precise movements that allow it to pick a single leaf from a tree. What type of skeleton
allows this movement to occur?



a. hydrostatic skeleton
b. exoskeleton
c. antagonistic skeleton
d. pressurized skeleton


A

Biology & Microbiology

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In human chromosomes, satellite DNA sequences of about 170 base pairs in length are present in tandem arrays of up to 1 million base pairs. Found mainly in centromere regions, these DNA sequences are called ________

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Which method of inserting DNA into cells is illustrated in Figure 8.1?

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