What are some of the different respiratory systems seen in animals?
What will be an ideal response?
Some organisms in aquatic or very moist habitats, and with large surface-to-volume ratios, use their skin as their respiratory surface. Other aquatic organisms use gills as the primary means of gas exchange. Land-based animals usually use some form of a lung to exchange gases, although insects use a spiracle trachea system instead.
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Women with an X-linked disorder could pass the genes for the disorder to ________, and men with an X-linked disorder could pass the genes for the disorder to ________.
A. both their daughters and sons; only their sons B. both their daughters and sons; their daughters and sons C. both their daughters and sons; only their daughters D. only their daughters; only their daughters
All of the following are true of puberty EXCEPT
A. sex organs grow and mature. B. males and females tend to go through puberty at the same age. C. hormones cause changes in body structure. D. eggs and sperm begin to be produced.
How do prokaryotic and eukaryotic chromosomes differ?
A) Eukaryotic chromosomes occur singly, and prokaryotic chromosomes occur as pairs. B) Genetic information is stored as DNA in eukaryotic cells and as proteins in prokaryotic cells. C) Prokaryotic chromosomes are not made from nucleotides. D) Prokaryotic chromosomes are not contained in a membrane-bound organelle.
There are vaccines to prevent infectious hepatitis and serum hepatitis, but none to prevent chronic hepatitis. Discuss why this is so
What will be an ideal response?