Which of the following was/were found in the Cambrian seas?
A. sponges and jellyfish
B. mollusks and worms
C. trilobites and nautiloids
D. red and green algae
E. All of the answer choices are correct.
E. All of the answer choices are correct.
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Based on the following classification scheme, which two organisms are most closely phylogenetically related? Why?
What will be an ideal response?
An mRNA molecule has a cap attached to its 5' end and a poly-A tail attached to its 3' end
a. True b. False Indicate whether the statement is true or false
Recombinant vaccines and inactivated vaccines typically require several shots to be effective
Indicate whether this statement is true or false.
Koopman’s research on mouse meiosis revealed ____
a. a meiosis promoting gene b. a meiosis inhibiting gene promotes retinoic acid production c. that retinoic acid prevents meiosis d. Cyp26b1 gene expression in embryonic testes but not ovaries e. germ cells form later in male mice that lack the Cyp25b1 gene