Chloroplasts and mitochondria in eukaryotes are thought to have originated by ____ , where one organism lives within another
Fill in the blank with the appropriate word.
endosymbiosis
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Which processes can be carried out by consumers?
A. Only cellular respiration B. Only photosynthesis C. Both photosynthesis and cellular respiration D. Neither photosynthesis nor cellular respiration
Do you think that the altered amino acid sequence in sickle-cell betaglobin could alter the overall structure of hemoglobin? a. No, a single amino acid substitution is too small of a change to affect a largeprotein
b. Yes, a single amino acid substitution could radically affect the overall structure ofhemoglobin.
Which organ is the target for insulin-like growth factors?
a. heart b. bone marrow c. gonads d. most body cells e. kidney
In tobacco plants, a H+/sugar cotransporter called NtSUT1 is required for sucrose loading into phloem. Levels of NtSUT1 are likely to be highest in what plant tissue?
A. roots B. leaves C. flowers D. seeds