Nautilus adjusts its vertical position in the water column by means of
A) Gas secretion
B) Use of low-density ions
C) Swimming upward continuously
D) Delicate projections from the shell that prevent sinking
Correct Answer:
Verified
Q5: Many planktonic organisms have excesses of ammonium,
Q6: Diatoms have a skeleton made of
A) Silica
B)
Q7: During a cycle of cell division, diatom
A)
Q8: Dinoflagellates
A) Usually have two flagellae used for
Q9: Dinoflagellates
A) Usually appear at the very beginning
Q11: During asexual reproduction in diatoms
A) Generation time
Q12: Cyanobacteria
A) Are abundant only in estuaries
B) Are
Q13: Cyanobacteria
A) Only occur as single cells in
Q14: Calanoid copepods are most closely related to
A)
Q15: Calanoid copepods
A) Are restricted to the Pacific
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