Which is a single-layered, hollow ball of cells?
a. cleavage
b. fetus
c. gastrula
d. zygote
e. blastula
e
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In many organisms, ____________________ functions to transfer genetic information from the nucleus to the
cytoplasm. Fill in the blank(s) with the appropriate word(s).
Which of the following statements is correct regarding DNA and RNA?
A) DNA remains in the nucleus at all times; RNA is produced in the nucleus but then leaves the nucleus. B) RNA remains in the nucleus at all times; DNA is produced in the nucleus but then leaves the nucleus. C) DNA and RNA both leave the nucleus after being produced. D) DNA and RNA both stay in the nucleus after being produced.
A primitive groove is the equivalent of a:
a. neural crest.
b. branchial groove. c. blastodisc. d. blastopore. e. neural groove
The thoracic cage includes all of the bones below except the ________.
Fill in the blank(s) with the appropriate word(s).