Which of the following is made from tree bark?
a. cinnamon
b. cocaine
c. maple syrup
d. hemp
e. saffron
ANSWER: a
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Suppose a tree possesses abundant chlorophyll a pigments. Why would it benefit from also producing other types of pigments?
What will be an ideal response?
What is the purpose of the cartilage rings in the trachea?
A) to prevent food from passing into the trachea B) to assist with contracting the trachea C) to produce mucus to trap debris D) to keep the trachea open
When the fetal pituitary gland matures, it releases ________, which triggers the sequence of events referred to as "labor."
A) oxytocin B) ACTH C) LH D) prostaglandins E) FSH
The fact that chromosomes should become shorter and shorter with each round of cell division is referred to as the ________.
a) the end-replication problem b) the replication paradox c) the truncated end problem d) shortening contradiction e) the short end hypothesis