From what feature are jaws through to have
evolved?
a. pharynx
b. vertebrae
c. legs
d. arms
e. gill arches
E
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What is the most likely reason for the conserved region of a promoter nearest the initiation point to have mostly adenines and thymines in its sequence?
A. RNA polymerases are better at incorporating uracils and thymines into RNA molecules than incorporating guanines and cytosines. B. This is the region for separating template and non-template strands, and A-T base pairs are easier to separate than G-C base pairs. C. Accessory proteins like sigma factors or transcription factors bind more easily to AT- rich sequences than they do to GC-rich sequences. D. It is possible to create more unique sequences for recognition with adenines and thymines than it is with guanines and cytosines. E. None of the above are likely reasons for the conserved region of a promoter nearest the initiation point having mostly adenines and thymines in its sequence.
Match the following names with the correct statements.
_______1. This German scientist proposed the theory of biogenesis—that life can arise only from preexisting life. _______2. This Dutchman built single lens microscopes as a hobby and is believed to be the first person to see live bacteria and protozoa. _______3. This German physician developed a step-by-step scientific method to prove that a particular microorganism causes a particular disease and contributed to what is known as “the germ theory of disease.” _______4. This French scientist discovered that microorganisms are responsible for fermentations, contributed to disproving abiogenesis, and contributed to what is known as “the germ theory of disease.” a. Robert Koch b. Louis Pasteur c. Rudolf Virchow d. Antony van Leeuwenhoek
When a cell makes a cell membrane bound growth factor that binds to receptors on neighboring cells causing them to proliferate this is an example of _____.
A. endocrine signaling B. direct intercellular signaling C. contact-dependent signaling D. paracrine signaling E. autocrine signaling
The outer layer of gray matter that covers the cerebral hemispheres is called the cerebral
A. cortex B. callosum C. meninx D. fissure