Blood is surveyed for foreign material in the spleen.
Answer the following statement true (T) or false (F)
True
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Which of the following statements is FALSE?
A) When plant cells are growing, they release expansins, which are enzymes that can expand the primary cell wall. B) The secondary cell wall often contains structural components, like lignin, that form a relatively rigid and complex network within the cell wall. C) A plant cell continues growing after the secondary cell wall forms but stops growing with the formation of the tertiary cell wall. D) Pectin is a component of the cell wall that attracts and holds water.
The movement of some molecules and ions out of excretory system tubules and back into body fluids is called ____
a. reabsorption b. excretion c. filtration d. secretion e. diffusion
For glycolysis to begin, ____
a. glucose must enter the mitochondria b. there must be an input of energy from ATP c. oxygen must be available d. some hydrogen acceptors must be available e. there must be an input of energy from ADP
What is the key defining characteristic of hominins?
a. language b. the use of tools c. opposable thumbs d. bipedal locomotion e. loss of supraorbital ridges