Which of these is a correct representation of the hierarchy of biological organization from least to most complex?
A) organelle of a stomach cell, digestive system, large intestine, small intestine, intestinal tissue, organism
B) organelle of an intestinal cell, digestive system, small intestine, large intestine, intestinal tissue, organism
C) molecule, intestinal cell organelle, intestinal cell, intestinal tissue, digestive system, organism
D) molecule, small intestine, large intestine, intestinal tissue, digestive system, organism
E) molecule, digestive system, digestive cell organelle, small intestine, large intestine, intestinal cell, organism
C) molecule, intestinal cell organelle, intestinal cell, intestinal tissue, digestive system, organism
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________ and ________ have been demonstrated to trigger DNA mutation associated with particular geographical cancers.
Fill in the blank(s) with the appropriate word(s).
In order to activate the cell mediated arm of the
adaptive immune response, which of the following must occur?
a. A naïve helper T cell must bind to an antigen-presenting dendritic cell. b. A naïve B cell must be activated in order to activate the effector helper T cell. c. A free bacterium must pass through a lymph node where it will directly activate the effector helper T cell. d. A damaged or infected body cell must pass through a lymph node in order to activate T cells. e. None of these will activate the cell mediate arm.
Which of the following is not one of the four main functions of the stem of a plant?
1.containing meristematic tissue that gives rise to new cells of the shoot 2.housing the vascular tissues 3.mechanical support 4.photosynthesis
A bryologist (a scientist that studies mosses, and their allies) gives a lecture to your biology class. In her lecture, she makes a reference to fern reproduction. She says, "Fern spores germinate into ________."
A. gametophytes, which are often heart-shaped and have roots that anchor the fern to the substrate B. gametophytes, which are often heart-shaped and have rhizoids that anchor the fern to the substrate C. sporophytes, which are often heart-shaped and have rhizoids that anchor the fern to the substrate D. sporophytes, which are often heart-shaped and have roots that anchor the fern to the substrate