The main purpose of preparing karyotypes is to ____
a. prepare for gene extractions
b. determine gender
c. determine which genes are on which chromosomes
d. separate DNA into its component parts
e. diagnose or rule out certain genetic disorders
ANSWER: e
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Match each description below with the cell type it characterizes: a. melanocyte b. keratinocyte c. fibroblast
_______ Major cell type found in the dermis; its primary function to secrete extracellular matrix. _______ Found in the epidermis; its primary function is production of pigments to color skin. _______ Major cell type found in the epidermis; its primary function is to protect underlying tissues and organs. What will be an ideal response?
In The Origin of Species, Darwin argued that the mechanism of descent with modification was ________.
A. artificial selection B. natural selection C. bionomial nomenclature
Which of the following is true of testicular cancer?
A. An undescended testis faces small risk of cancer. B. It can be detected with the help of a Pap test. C. Its cause has not been ascertained yet. D. Every lump in the testes is cancerous
All of the following are a form of potential energy that can be used by a cell EXCEPT
A. concentration gradient. B. ATP. C. NADH. D. nitrogen. E. an electrical/ion gradient.