The blastopore is the opening to the blastocoel
____________________ Indicate whether the statement is true or false.
F, archenteron
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Which statement is NOT true?
a. Electrons closest to the nucleus are at the lowest energy level. b. No more than two electrons can occupy a single orbital. c. Electrons are unable to move out of the assigned orbital space. d. The innermost orbital holds two electrons. e. At the second energy level there are four possible orbitals with a total of eight electrons
The transfer of DNA into eukaryotic cells is known as ________
A) transformation B) transduction C) transfection D) transcription E) translation
While mosses can cover a significant area of land, they are never more than a few centimeters tall. Why do they not grow tall?
A) They have no vascular system, so they cannot transport water over long distances. B) They are annuals and simply don't live long enough to get very tall. C) They don't get enough sunlight to grow tall. D) Herbivores constantly eat them to the ground.
There is no easy way to test for pathogens such as
Select one: a. Listeria. b. Salmonella. c. E. coli O157:H7. d. Norovirus.