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The current standard for first-trimester risk assessment is the combined test using maternal age and ………………………………….. , ………………………… , ……………………………………………………. . ( Choose all that applies).

Is this the proper level for NT measurement? Why? ( Provide 4 reasons).  

Feta heart rate should be always above 100 bpm disregarding the gestation age. 

Combustion of natural gas increases atmospheric levels of greenhouse gases.  

 Plants need water because it is required for photosynthesis.

Most high-level radioactive waste is currently stored on-site near the nuclear plant where it was used.

 Plutonium ore is mined to be used as fuel in nuclear reactors.

 Silt particles are smaller than clay particles.

 Ecologically speaking, why is it better for humans to be vegetarians than to be carnivores?

Urban trees: