Chordates are characterized by having a ________, a dorsal, flexible supportive rod.

Fill in the blank(s) with the appropriate word(s).


notochord

Chordates are characterized by having a notochord, a dorsal, flexible supportive rod.

Biology & Microbiology

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Which of the following describes the process of eutrophication?

a. Nutrient runoff causes the overgrowth of algae. b. Minerals and nutrients cycle through the biotic world. c. Excess phosphorus decomposes plant roots. d. Rainwater falls to the ground through sulfur dioxide gas.

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In this diagram of the life cycle of a fern, which structure, A, B, C, or D, must swim through free water?

1.A 2.B 3.C 4.D

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What activity of the liver makes it act as an accessory organ?

A) production of bile B) synthesis of blood-clotting factors C) destruction of old blood cells D) detoxification

Biology & Microbiology

Choose the letter of the best match from the following:A. Birth control pillB. Intrauterine deviceC. DiaphragmD. Foams and jelliesE. VasectomySperm blockage.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology