Which of the following is INCORRECTLY paired?
a. pancreas ? insulin
b. thyroid gland ? thyroxine
c. hypothalamus ? melatonin
d. adrenal cortex ? glucocorticoids
e. posterior pituitary ? oxytocin
C
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The change from indirect development to direct development in sea urchins illustrates the following concepts: (choose all that apply)
_____ Differences in gene expression patterns can cause major changes in development. _____ An organism can arrive at the same adult body plan in different ways. _____ Changing the mode of development requires evolving a lot of new genes. _____ Urchins have a unique genome that is especially suited to major developmental changes. _____ Once a lineage evolves a mode of development, it becomes “locked in”. _____ Radially symmetric organisms are subject to different evolutionary pressures than bilateral organisms. _____ Chromosomal deletions have major effects on development.
Which reaction is most likely to have more products than reactants when the reaction reaches
equilibrium?
a. ?G = ?25 kcal/mol b. ?G = ?50 kcal/mol c. ?G = ?75 kcal/mol d. ?G = ?100 kcal/mol e. They will all have the same ratio of products to reactants regardless of the ?G value.
Reptiles are __________ (cold-blooded animals) with scales. Fill in the blank(s) with the appropriate word(s)
In flowering plants, the sperm does not have to swim to the egg. The sperm reaches the eggs by
A) wind pollination. B) a pollen tube. C) cell division within the spore case. D) burrowing through the embryo sac wall. E) digestion of the seed coat.