Which animal is a chordate?
a. sea star.
b. sea cucumber.
c. acorn worm.
d. lancelet.
b
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All EXCEPT which of the following has an effect on
seed germination? a. moisture b. temperature c. carbon dioxide d. number of daylight hours e. oxygen
What is the correct order of processes involving the movement of oxygen from the environment to mitochondria in vertebrates?
A) ventilation, circulation, cellular respiration B) circulation, ventilation, cellular respiration C) diffusion in tissues, cellular respiration, diffusion at respiratory surface D) ventilation, diffusion in tissues, circulation E) circulation, cellular respiration, diffusion in tissues
Nearly two-thirds of every vertebrate's body is composed of ________.
A. muscle B. water C. carbon D. bones
Astronauts returning to Earth from an extended stay in space have to be extremely careful not to break a bone. It takes several weeks to restore normal bone strength. Which would be the best regimen to rebuild the lost bone tissue?
A) Stay inactive, avoiding exercise until the lost bone tissue is rebuilt. B) Start with walking and build up to jogging, with an extra regimen of light weight lifting in the gym. C) Hit the gym and get going with a few weeks of heavy weight lifting. D) Several weeks of swimming will rebuild all lost bone mass.