Which lineage includes living members that are the ray-finned fishes, with fins supported by thin and flexible bony rays?
a. Actinopterygii
b. Sarcopterygii
c. Petromyzontoidea
d. Chondrichthyes
Ans: a. Actinopterygii
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A selective growth medium
A. allows only certain bacteria to grow. B. allows all bacteria to grow. C. allows no bacteria to grow. D. accentuates differences between the growing bacteria.
Substance P activates chemoreceptors
Indicate whether the statement is true or false.
Which conclusion do these data support?
1.Wild type mice are slower swimmers.
2.Both wild type mice and mice with the R451C mutation are able to learn.
3.Wild type mice are quicker learners.
4.Genetic modification improves swimming ability in mice.
All multi-celled eukaryotes have receptors that bind
to PAMPs, which include a. components of prokaryotic cell walls b. bacterial flagellum c. bacterial pilus proteins d. double stranded RNA e. all of these.