What is the main reason that the tundra does not have large plants?

A) the permafrost persists, even during the summer
B) the amount of rainfall is not enough for large plants to survive
C) the other species of plants have outcompeted them for resources
D) the amount of sunlight is not great enough for large plants to survive
E) the seeds of large plants were never dispersed into these regions


Ans: A) the permafrost persists, even during the summer

Biology & Microbiology

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A short base sequence near the poly-A tail of a mature mRNA functions to ________

a. encode a destination for the molecule and block translation before it is delivered b. aid binding of the mRNA by the small ribosomal subunit c. bind to complementary regions on microRNAs, signaling degradation of the message d. delay the degradation of the coding region by exonucleases

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Below is a figure from an experiment that was performed to measure the effect of carbonate ion (CO32-) concentration on the calcification (growth) rate of coral reefs. At which point on the graph is the ocean pH the lowest?


A) A
B) B
C) C
D) D

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Restriction endonucleases are obtained from various species of bacteria.

Answer the following statement true (T) or false (F)

Biology & Microbiology