The plant organ that supports the plant body and carries nutrients between different parts of the plant is the

A. root
B. stem
C. leaf
D. flower


Ans: B. stem

Biology & Microbiology

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B cells and T cells that react with self-antigens are destroyed by____

a. apoptosis b. phagocytosis c. cytokinesis d. diakinesis e. endocytosis

Biology & Microbiology

Which of the following statements is false?

a. The tissues of arthropods are bathed with hemolymph, which delivers oxygen to their cells. b. In an open circulatory system the heart is still responsible for pumping oxygen-rich fluid. c. Earthworms have a central heart that pumps blood to all their tissues. d. Blood vessels are found in the open circulatory systems common to some invertebrates. e. Hemocyanin is the oxygen transport pigment found in the open circulatory system of invertebrates.

Biology & Microbiology

According to NFPA, the minimum rest time during rehabilitation is ____ minutes.

a. 20 b. 5 c. 10 d. 15

Biology & Microbiology

The Gram stain works because of differences in the ________ of bacteria.

A. genetic characteristics B. cell walls C. cell membranes D. antigens E. capsules

Biology & Microbiology