Endosperm tissue arises by the fusion of a sperm nucleus with two nuclei of the
A. female egg.
B. female gametophyte central cell.
C. male gametophyte.
D. ovule wall.
E. female style.
Answer: B
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A patient is diagnosed with a severe intestinal disease caused by E. histolytica. Which of the following treatments should be administered?
a. Diloxanide furoate b. Metronidazole c. Metronidazole plus iodoquinol d. Iodoquinol and diloxanide furoate
The posterior lobe of the pituitary gland stores and secretes ____
a. ADH only b. TSH only c. oxytocin only d. ADH and oxytocin only e. ADH, oxytocin and TSH
What is the tendency for molecules to stick together?
a. Cohesion b. Hydrophobic c. Hydrophilic d. Evaporation e. None of these choices.
Amphibians evolved directly from which ancestral organisms?
a. fishes b. reptiles c. small mammals d. soft-bodied animals e. marine invertebrates