Organisms that invest all their energy into growth, development, and energy storage, followed by one massive reproductive effort and then death, are called ________
Fill in the blank(s) with correct word
semelparous
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DNA repair:
A. can fix chromosomal inversions and translocations. B. can involve excision of bases flanking a distortion in the helix. C. always prevents errors. D. involves a set of proteins that are always active. E. is only active during DNA replication.
Which of the following statements characterize euphylls?
_____ They differ from lycophylls by having a single, unbranched vein rather than a branched vascular system. _____ They are believed to have evolved from a branch that flattened and developed photosynthetic tissue between the branches. _____ They are also called microphylls because they tend to be much smaller than lycophylls. _____ They are the leaf-like photosynthetic structures found among bryophytes. _____ They allow increased photosynthetic ability when compared to lycophylls.
Plant hormones bind specific cellular receptor molecules that trigger gene expression responses. Which statement is correct concerning these responses?
A. Only cells lacking receptors can bind hormones. B. Only cells in the meristem can respond. C. Only cells that express the appropriate receptors can bind hormones. D. Only cells that have been previously activated can bind hormones. E. None of these choices is correct.
What is lost when acetyl-CoA enters into the Krebs cycle?
a. pyruvate b. coenzyme A c. fructose bisphosphate d. oxaloacetate e. citrate