Adjacent animal cells utilize ____ to rapidly communicate with each other

a. gap junctions
b. plasmodesmata
c. hormones
d. desmosomes
e. neurotransmitters


A

Biology & Microbiology

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In the cAMP pathway, the G protein activates ____

a. adenylyl cyclase b. diacylglycerol c. phospholipase C d. inositol triphosphate e. phosphodiesterase

Biology & Microbiology

When tropical forests are cut for agriculture, they often do not produce highly productive crop growth

What is probably limiting the growth of a crop in the tropical forest?

a. Sunlight. b. Rainfall. c. Carbon dioxide d. Soil nutrients. e. Bacteria.

Biology & Microbiology

Fire results in the production of ash from vegetation and soil organic matter. This ash contains nutrients that are most often

A) lost from ecosystems almost immediately following the fire. B) devoid of elements required for plant growth. C) unavailable for mineralization causing nutrient retention in the system. D) available for plant uptake and vulnerable to loss if not taken up by recovering vegetation.

Biology & Microbiology

Addition of a poly(

A) tail to an mRNA molecule ________. A) allows the mRNA to be recognized by ribosomes during translation B) allows mRNA molecules to be more stable in the cytoplasm C) results in removal of introns D) only occurs in bacteria E) is an important step in translation

Biology & Microbiology