What help move lymph throughout the lymph vessels?
a. constriction of blood vessels
b. skeletal muscle and breathing movements
c. conscious actions
d. dilation of blood vessels
Ans: b. skeletal muscle and breathing movements
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In hearing, the last place that pressure or sound waves pass through is the
a. bones of the middle ear. b. tympanic membrane. c. oval window. d. round window. e. tectorial membrane.
Exterior to the plasma membrane, plant cells have ________ which protect and support the plant cell.
Fill in the blank(s) with the appropriate word(s).
How can RNA be distinguished from DNA?
A) RNA does not contain a sugar. B) RNA lacks the base uracil. C) RNA is never found in the nucleus. D) RNA is single-stranded.
After fertilization the zygote continuously develops until an embryonic plant is formed within the seed.
Answer the following statement true (T) or false (F)