Which structure produces immune cells and is part of the lymphatic system?
What will be an ideal response?
thymus
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Which of the following is NOT a known characteristic of any dinosaurs?
a. bright coloration b. bipedal posture c. feathers d. gills for breathing underwater e. posture with heads upright and tails off the ground
Harrison and van Buuren identified a phosphate transport protein in Glomus versiforme, which is a
a. carnivorous plant. b. bacterium that parasitizes plants. c. mycorrhizal fungus. d. bacteroid. e. parasitic plant.
Which of the following is involved in proofreading during DNA replication?
A) 5' to 3' exonuclease activity of DNA polymerase B) 3' to 5' exonuclease activity of DNA polymerase C) 5' to 3' endonuclease activity of DNA polymerase D) 3' to 5' endonuclease activity of DNA polymerase E) RNA polymerase
Lipid bilayers are permeable only to molecules that are _______ and _______.
a. large; uncharged b. large; charged c. small; uncharged d. small; charged