Currently, what is the biggest threat to the Klamath-Siskiyou forest, which is an endangered ecoregion in North
America?
a. nesting birds
b. greenhouse gases
c. rising sea levels
d. fires
e. logging
ANSWER: e
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If each of two bacteria have a %GC of 50%, this means that they are both definitely closely related
Indicate whether this statement is true or false.
Telomeres, tandem repeat sequences at the ends of chromosomes, generally get shorter after every cell division. The resulting mechanism involves a protein called p53, which ________
A) puts the cell into a permanently nondividing state B) causes the cell to enter cell senescence C) may induce the cell to undergo programmed cell death D) All of the above.
GPCRs are receptor proteins found in the plasma membrane that are important for cellular communication. What cellular structure makes GPCRs?
A) the smooth endoplasmic reticulum B) the rough endoplasmic reticulum C) Golgi apparatus D) mitochondria
Hops is the herb that gives beer some of its aroma and flavor.
Answer the following statement true (T) or false (F)