Check the phyla that are considered to be lophotrochozoans.
_____ Platyhelminthes.
_____ Mollusca.
_____ Annelida.
_____ Rotifera.
_____ Nematoda.
__X__ Platyhelminthes.
__X__ Mollusca.
__X__ Annelida.
__X__ Rotifera.
_____ Nematoda.
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Purine bases, such as adenine and guanine, have ________ joined ring(s) for their structure, compared to pyrimidine bases, such as cytosine and thymine, that have ________ ring(s) in their structure.
Fill in the blank(s) with the appropriate word(s).
Among the different forms of electromagnetic radiation emitted by the sun, which form is visible?
A. ultraviolet B. gamma rays C. light D. microwaves E. infrared
The predictable rate of ____________________ allows tracers to be used in research studies
Fill in the blank(s) with the appropriate word(s).
What does a plant gain from a mycorrhizal relationship?
A) It allows roots to absorb water and solutes more rapidly. B) It increases the surface area for photosynthesis. C) It helps to break down complex molecules in the soil to release micronutrients. D) It helps to break down decaying organic matter into essential plant nutrients.