Bacterial cells that cannot readily pick up DNA molecules from their surroundings can be forced to do
so by ____.
a. artificial transformation
b. double crossing over
c. crossing over
d. constriction
e. infection
A
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In skin, the cells of the epidermis connect to the basal lamina through cellular junctions known as hemidesmosomes. Select the cytoskeletal filament that helps maintain the integrity of this connection
A. intermediate filaments B. microtubules C. microfilaments D. Responses a and c are both correct.
Muscle contraction does not shorten the muscle filaments (myosin and actin). How then, does a contraction produce tension?
What will be an ideal response?
__________ sensations arise from receptors near
organs in body cavities. Fill in the blank(s) with the appropriate word(s).
As part of the diving reflex of seals, the heart rate increases
____________________ Indicate whether the statement is true or false.