What are two functions of mucilage in algae?
What will be an ideal response?
The mucilage helps protect algae from desiccation during periods of low tide. It also may act to remove larvae and sessile organisms that may settle on the surface of the algae, and attach the fertilized egg to a suitable surface.
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Two individuals with the same genotype may not express the same phenotype because gene expression is influenced by:
A. other genes alone. B. the environment alone. C. a combination of genes and environment. D. genes alone in some people and the environment alone in other people. E. none of these
A new antibiotic is developed that interferes with the way tRNA fits into bacterial ribosomes. How would this kill the bacteria?
A) The bacteria would be unable to produce necessary enzymes to carry out basic metabolism. B) The tRNA would be unable to carry out transcription. C) Ribosomes would not be able to produce mRNA, and cell functions would halt. D) tRNA would not unwind the DNA to allow DNA polymerase to copy it; thus, cell division would stop.
What is meant by the description "antiparallel" regarding the strands that make up DNA?
A) The twisting nature of DNA creates nonparallel strands. B) The 5' to 3' direction of one strand runs counter to the to direction of the other strand. C) Base pairings create unequal spacing between the two DNA strands. D) One strand contains only purines and the other contains only pyrimidines.
Which of the following is a correct useage of binomial nomenclature?
A. Homo Sapiens B. homo sapiens C. Homo sapiens D. Homo Sapiens