The male gametophyte of flowering plants is produced by cell divisions within the
A) sepal. B) carpel. C) anther. D) stigma. E) filament.
C
You might also like to view...
A covalent chemical bond is one in which _____
A) electrons are removed from one atom and transferred to another atom so that the two atoms become oppositely charged B) protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms C) outer-shell electrons of two atoms are shared so as to satisfactorily fill their respective orbitals D) outer-shell electrons of one atom are transferred to fill the inner electron shell of another atom E) electrons from the same atom, but opposite spins, are paired
Which human tissue cells can be over 1 metre in length?
a. adipocytes b. skeletal muscle cells c. neurons d. columnar epithelial cells
Plant hormones produce their effects by _____. I) altering the expression of genes II) modifying the permeability of the plasma membrane III) modifying the structure of the nuclear envelope membrane
A. only I B. only II C. only III D. only I and II E. I, II, and III
Which behavior is an example of agonistic behavior?
A) A dog raises its hackles, bares its teeth, and stands tall to appear threatening. B) A honeybee does a waggle dance to indicate the direction of food. C) A male ruffed grouse spreads its tail and beats its wings to attract a female. D) Ants mark their trails by releasing pheromones.