Which of the following organisms lack membrane bound organelles?
a. plants
b. animals
c. prokaryotes
d. fungi
c. prokaryotes
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A pregnant woman who smokes risks
a. delivering an underweight baby. b. a greater chance of miscarriage. c. a greater chance of stillbirth. d. a greater chance of premature delivery. e. all of these.
The formation of the ________ cavity and the differentiation of the embryonic disk into ectoderm and endoderm occurs at the end of the pre-embryonic period of development
Fill in the blank(s) with correct word
The time interval from parent cell to two new daughter cells is called the
A. binary fission. B. growth curve. C. death phase. D. generation time. E. culture time.
What type of cell does Ehrlichia chaffeensis infect in humans?
A) capillary endothelial cells B) B lymphocytes C) neutrophils D) monocytes E) eosinophils