Which of the following organisms can perform photosynthesis?
a. vertebrates
b. animals
c. fungi
d. algae
e. invertebrates
Ans: d. algae
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Future kidney cells and heart cells can differentiate into their respective specialized cell types because
A. they express a different set of genes during development. B. they possess different genes. C. they arise from different embryonic stem cells. D. they express different transcription factors. E. they express different genes and different transcription factors during development.
The protrusible rasping organ in a mollusk's mouth that is used to scrape food from the substrate is
A. a veliger. B. a visceral mass. C. composed of nacre. D. a radula. E. an ammonite.
Which blood type is the universal recipient?
a. A b. B c. AB d. O e. none of these
Match the following terms with the correct definition
1. Portion of the antigen recognized by the immune system 2. Foreign molecules that are too small to elicit an immune response 3. These foreign materials elicit allergic responses 4. Antigen Binding site a. Haptens b. Epitope c. Allergen d. Paratope