Invertebrates on land use __________ or __________ systems for gas exchange. Fill in the blank(s) with the appropriate word(s)
ANSWER: book lungs; tracheal
You might also like to view...
The specific white blood cells that HIV attaches to are the ____________ cells.
A. CD4+ B. gp120 -T C. CCR5-T D. CXCR4-T E. CD8-T
Herbivores are ____ energy transfer(s) away from the sun
a. one b. two c. three d. four e. five
Most cases of food poisoning occur in the home, not restaurants.
Answer the following statement true (T) or false (F)
Select from the following the statements that are most likely to be valid (there may be more than one valid statement)
A. A single signal may lead to more than one response in the cell B. A single signal may lead to the the activation of more than one intracellular signaling component or cascade C. Different signals originating from the plasma membrane can be integrated by cross-talk between different signaling pathways inside the cell D. Signals can only be turned on and off by phosphorylation of tyrosine residues.