What is the most abundant gas in environmental tobacco smoke, which can lead to serious consequences for people with other health problems when exposed to elevated levels of this gas?
What will be an ideal response?
carbon monoxide (CO)
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In photosynthesis, ATP is made by
A. chemiosmosis. B. glycolysis. C. the Krebs cycle. D. the Calvin cycle. E. the passing of electrons from photosystem I to an electron transport chain.
Bacteria and Archaea are general single-celled organisms, but some phyla form sheaths around multiple cells to facilitate attachment and filament formation
Indicate whether the statement is true or false.
Answer the following statements true (T) or false (F)
1. Prokaryotic genomes often contain a circular chromosome with hundreds of thousands of genes and highly repetitive DNA. 2. In humans, the genome is made up of 22 autosomes and 1 sex chromosome. 3. On rare occasions, transposable elements contain a central region that encodes transposase, an enzyme that facilitates the actual transposition. 4. At the time that transposable elements were discovered by Barbara McClintock, many of her colleagues agreed with her discovery.
The concentration of the pesticide DDT is likely lowest in which of the following?
A. a seagull B. a minnow C. a mosquito larvae D. algae E. plankton