Hox genes are known to be important for: (check all that apply)
A. spatial patterning.
B. apoptosis.
C. cell-cell adhesion.
D. cell metabolism.
Answer: C
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The ________ is the minimum energy required before two molecules can be successful in producing a reaction.
Fill in the blank(s) with the appropriate word(s).
In genetic goitrous cretinism, the phenotype is caused by accumulation of thyroid hormone and its breakdown products
a. True b. False Indicate whether the statement is true or false
Calcium ions are stored in the sarcoplasmic reticulum
____________________ Indicate whether the statement is true or false.
The planet Mercury is closer to the sun than the planet Venus. However, temperatures on Venus are hotter than temperatures on Mercury. Why would this be the case?
A) Mercury has a thicker atmosphere than Venus that blocks heat from the sun. B) Mercury spins more quickly than Venus, so its surface cannot heat up as quickly. C) Venus has a thicker atmosphere than Mercury that traps heat from the sun. D) Venus is cooled by high concentrations of water vapor in its atmosphere.