Microscopic algae typically fall under the classification of:
a. nekton.
b. phytoplankton.
c. zooplankton.
d. benthos.
e. profundal microorganisms.
B
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Coccolithophorids are marine members of the brown algae
________________ Indicate whether the statement is true or false.
In a neutral solution the concentration of _____.
A) hydrogen ions is equal to the concentration of hydroxide ions b) hydrogen ions is less than the concentration of hydroxide ions c) water molecules is less than the concentration of hydrogen ions d) water molecules is less than the concentration of hydroxide ions e) hydrogen ions is greater than the concentration of hydroxide ions
If a cell containing 20 chromosomes divides by meiosis, how many daughter cells will be produced?
a) 10 b) 20 c) 8 d) 2 e) 4
Which class of hormones produced in the roots of plants promotes cell division and growth and retards the aging of flowers and leaves?
A) gibberellins B) phytochromes C) cytokinins D) ethylene