Small, fishlike marine chordates, pointed at both ends with no distinguishable head, in which the notochord runs the entire length of the nerve cord, are called

A. tunicates.
B. arrow worms.
C. acorn worms.
D. lampreys.
E. lancelets.


Answer: E

Biology & Microbiology

You might also like to view...

B and T cells become activated and divide to produce identical cells when _____

a. activated by an antigen b. major histocompatibility genes are expressed c. activated by the presence of cancerous cells d. plasma cells begin to produce and secrete antibodies e. killer T cells bind to any pathogen

Biology & Microbiology

Which type of chemical linkage is the weakest?

a. polar covalent bonds b. van der Waals forces c. ionic bonds d. hydrogen bonds e. nonpolar covalent bonds

Biology & Microbiology

The dashed line in the accompanying figure represents a(n) ____

a. covalent bond b. ionic bond c. hydrogen bond d. polar covalent bond e. hydrophobic interaction

Biology & Microbiology

Which of the following sequences indicates the promoter region of a gene?

a. CAAT b. UAAG c. CTTT d. ACAT e. TAAC

Biology & Microbiology