The majority of animals caught in shrimp trawls are the shrimp themselves
Indicate whether the statement is true or false
F
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Hormones are a class of signaling molecule carried by the ___________________ to target cells. Fill in the blank(s) with the appropriate word(s)
The early explorers used sailing ships, which were blown by the major winds; therefore, Columbus and other sailors generally traveled from Europe to North America by the mid-latitude westerlies, and returned to Europe by the southern easterlies near the equator.
Answer the following statement true (T) or false (F)
A group of three nucleotides on mRNA is called a(n)
A. codon. B. anticodon. C. exon. D. intron.
In some molluscs, the free-swimming larva is a trochophore while in others, it is a veliger with the beginnings of a foot, shell and mantle. What is the relationship of these molluscan juvenile stages?
a. A veliger is found strictly in terrestrial molluscs b. The trochophore is considered ancestral and the veliger is a derived larval stage c. The two larval forms represent two early and distinct branches of molluscs d. The veliger is ancestral and the trochophore is a derived larval stage e. Only the cephalopods have the veliger stage; all other molluscs have a trochophore stage