What type of receptor is used for navigation by animals such as sea turtles and homing pigeons?
1.Chemoreceptors
2.Electroreceptors
3.Magnetoreceptors
4.Nociceptors
3
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Phycobiliproteins are
A. found in purple sulfur bacteria. B. found in cyanobacteria. C. used to gather wavelengths of light that are not well absorbed by chlorophyll. D. are used to reduce hydrogen sulfide. E. found in cyanobacteria AND used to gather wavelengths of light that are not well absorbed by chlorophyll.
It is difficult to pinpoint when the first terrestrial plants appeared because early plants lacked spores
Indicate whether the statement is true or false.
During which stage of the cell cycle does the mitotic spindle begin to form?
A. telophase B. G1 C. S phase D. prophase
Imagine that you've isolated a yeast mutant that contains histones resistant to acetylation. What phenotype do you predict for this mutant?
A) The mutant will grow rapidly. B) The mutant will require galactose for growth. C) The mutant will show low levels of gene expression. D) The mutant will show high levels of gene expression.