The peripheral chromatin, which contains fine granules that are uniform in size and are evenly distributed, can be found in which one of the following protozoa?
a. Endolimax nana
b. Iodamoeba butschlii
c. Entamoeba coli
d. Entamoeba histolytica
D
The peripheral chromatin of the intestinal protozoan (amoeba), E. histolytica, contains fine gra-nules that are uniform in size and are evenly distributed. It also possesses progressive fingerlike pseudopodia and rapid motility.
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In his monohybrid crosses, Mendel deduced that one trait was recessive because _____
A. that trait was not present in the F1 and did not reappear in the F2 B. that trait was present in the F1 and in the F2 C. that trait was not present in the F1 and reappeared in the F2 D. that trait was present only in the parents E. that trait was present only in the F2
ATP is a type of nucleotide
__________________ Indicate whether the statement is true or false.
Which of the following methods is NOT a method of viral penetration?
a. Injection b. Membrane fusion c. Endocytosis d. Exocytosis e. None of these are methods of penetration
A species that plays a major role in determining the structure of its ecological community is
A) a predator. B) a keystone species. C) a dominator species. D) the species with the largest size. E) the most abundant species in the community.