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

Biology & Microbiology

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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.

Biology & Microbiology

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.

Biology & Microbiology

Reptiles are __________ (cold-blooded animals) with scales. Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology

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.

Biology & Microbiology