The most common cancer of the eye is
a. retinoblastoma.
b. scleral sarcoma.
c. malignant melanoma.
d. rhabdomyosarcoma.
e. lymphoma.
C
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What makes the metabolism of Ferroglobus interesting in the context of evolution?
A) Ferroglobus is an anaerobic iron-oxidizing chemolithotrophic autotroph that may represent a key metabolism that allowed for the oxidation of ferrous iron without molecular oxygen. B) Ferroglobus can use H2 or H2S as electron donors in its energy metabolism and is thermophilic, thus representing the earliest hypothesized forms of life. C) Ferroglobus lacks cells wall and becomes encrusted in oxidized iron. D) Ferroglobus is both an iron- and nitrate-reducer and is probably the last common ancestor of all iron- and nitrate-reducing organisms.
Effector helper T cells release cytokines only after binding to a(n) ____
a. antigen-presenting dendritic cell b. memory T cell c. complement protein d. MHC-antigen complexes on B cells e. antibody producing B cell
Explain the basic ideas of natural selection proposed by Charles Darwin
What will be an ideal response?
Organisms that use the Calvin cycle to fix CO2 are:
a) chemoautotrophs b) chemoheterotrophs c) chemoautotrophs and chemoheterotrophs d) photoautotrophs and chemoautotrophs