A testcross involves
a. two F1 hybrids.
b. an F1 hybrid and an F2 offspring.
c. two parental organisms.
d. an F1 hybrid and the homozygous dominant parent.
e. an F1 hybrid and an organism that is homozygous recessive for that trait.
E
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A complex formed during a reaction that resembles both the substrates and the products is called the ________ state complex.
Fill in the blank(s) with the appropriate word(s).
A(n) ________ is the ring of cytoplasm through a plasmodesmata
Fill in the blank with correct word.
The maintenance of a constant internal environment is
A. positive feedback. B. negative feedback. C. homeostasis. D. positive regulation.
Which antimicrobic does not interfere with protein synthesis?
A. erythromycin B. tetracyclines C. aminoglycosides D. chloramphenicol E. trimethroprim