Although choanoflagellates are fundamentally unicellular organisms, they possess the genes that code for cadherins and integrins
Which of the following hypotheses regarding the
function of these molecules in choanoflagellates is supported by laboratory experiments?
A. Choanoflagellates use adhesion molecules
to facilitate the capture of bacterial prey.
B. The genes are not actually expressed and
are simply vestiges of an ancestor that used
cadherins and integrins for adhesion.
C. Cadherins and integrins are used for cell
adhesion during the formation of temporary
multicellular structures to defend against
predators.
D. Cadherins and integrins are used for cell
adhesion during the formation of complex
multicellular structures that are resistant to
freezing temperatures.
E. Choanoflagellates are parasites and use
cadherins to attach to host organisms.
A
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A mixture of DNA fragments is amplified from a sample of ocean water. Which gene(s) could be definitively categorized as originating from a species of animal?
A. Genes for ATP synthase B. Genes for RuBisCO C. Gene for Spongin D. Cell cycle regulatory genes E. Genes for biosynthesis of chitin Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about animal genes? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process ·Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The energy of wavelengths that appear ________ is LEAST useful to photosynthesis
A) red B) green C) blue D) orange
Where does human herpesvirus 4 (EBV) become latent?
A) in the dorsal root ganglion B) in B lymphocytes C) in cytotoxic T lymphocytes D) in brachial ganglia E) in oligodendrocytes
A biological safety cabinet minimizes the chances of contaminating cultures by all of the following except
A) consistent flame sterilization on the inside surfaces. B) readily being decontaminated using UV light. C) limiting access to inside the cabinet. D) regular surface cleaning with an antimicrobial solution. E) maintaining a specific flow of filtered air.